Float Type Level Switches Contents Page Start

A-1Visit www.GemsSensors.com for most current information.

LEVE

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MAG

NET

REED SWITCHGLASS

ENVELOPE

N

HERMETICALLYSEALED MAGNETICREED SWITCH

PERMANENTMAGNET

FLOAT

Float Type Level SwitchesSingle Point

GEMS Level Switches operate on a direct, simple principle. In most models, a float encircling a stationary stem is equipped with powerful, permanent magnets. As the float rises or lowers with liquid level, the magnetic field generated from within the float actuates a hermetically sealed, magnetic reed switch mounted within the stem. The stem is made of non-magnetic metals or rugged, engineered plastics. When mounted vertically, this basic design provides a consistent accuracy of ±1/8 inch. Multi-station versions use a separate reed switch for each level point being monitored.

Side-mounted units use different actuation methods because of their horizontal attitude. The basic principle, however, is the same: as a direct result of rising or falling liquid, a magnetic field is moved into the proximity of a reed switch, causing its actuation.

Reed Switch ReliabilityThe durable construction of these reed switch designs ensures long, trouble-free service. Because the effects of shock, wear and vibration are minimized, these hermetically sealed switches provide precise repeatability with no more than 1% deviation. The switch actuation points remain constant over the life of the unit. See “Reed Switch Protection” in Appendix X for information on extending the life of GEMS Level Switches.

Wide VarietyTop/Bottom Mounting

LS-3 LS-1700

LS-1950 LS-1900TFE

Side Mounting

LS-7 Plastic LS-7 Alloy LS-2050

Specialty

Bottles Slosh Shield Leak Detector

Additional technical information can be found in Appendix X.

Contents Page Start

Small Size

Engineered Plastic ........................................... A-2

Alloy ........................................................................ A-8

Large Size

Engineered Plastic .........................................A-12

Alloy ......................................................................A-13

Specialty Switches ...............................................A-20

Leak Detection .......................................................A-22

INTRODUCTION

A-2 Visit www.GemsSensors.com for most current information.

LEVEL SWITCH

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2-3/32˝(53.2 mm)

1-9/16˝(39.7 mm)

1˝(25.4 mm)

1/8˝ NPT

3/8˝ – 16

1/2˝ HEX

1/2˝ HEX

1˝ DIA(25.4 mm)

L1

17/32˝(13.4 mm)

sgnitnuoMetanretlA61-̋8/3

daerhTthgiartS˝8/1G

PSB82-̋8/157.1x21M

daerhTthgiartS

lacirtcelEnoitanimreT seriWdaeL elbaC elbaC

.14˝(3.6mm)

9/16˝HEX

.315˝ REF.(8.0mm)

.14˝(2.6mm)

1/2˝HEX

.390˝ REF.(9.9mm)

.20˝(5.1mm)

5/8˝HEX

.475˝ REF.(12mm)

Small Size – Engineered PlasticsLS-3 Series – Offers High Reliability, Compact Size and Low Costs in NPT, Straight and Metric ThreadsIdeal for shallow tanks or restricted spaces, or for any low-cost, high volume use. LS-3 Series are available in FDA compliant materials, consult GEMS for details.

Polysulfone Float

FDA

For water based liquids, with limited use in oils and chemicals.

Polypropylene Float (Hollow)

Features a low specific gravity float offering broad chemical compatibility.

Polypropylene Float (Solid)

With Polypropylene stem and float, switch offers broad chemical compatibility.

Buna N Float

Ideal for oils and fuels.

ALL-PVDF

FDAWetted materials of

construction comply with FDA food contact regulations.

Stem and float of corrosion-resistant PVDF for ultra-pure applications.

Dimensions – 1˝ Float Models only

† L1= Actuation Level (see chart below)

Common SpecificationsApprovals: U.L. Recognized – File No. E45168; CSA Listed – File No. 30200. CE Declaration Available Upon Request.

NSF materials are Standard 61 compliant. For NSF approved level switches contact Gems.Switch SPST: 20 VA, 120-240 VAC. Units are shipped N.O. unless otherwise specified. Selectable, N.O. or N.C., by inverting float on unit stem.

New 3/4˝ Polypropylene Float

See next page for details.


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Stem andMounting Material

Float Material

FloatDia.

ActuationLevel1

Min. LiquidSp. Gravity

Pressure Max.@ 70°F (21°C)

OperatingTemperature

MountingType

Electrical Termination Part Number

Polysulfone Polysulfone 1˝ 3/4˝ (19.0 mm) .75 50 psi

(3 bar)-40°F to +225°F

(-40°C to +107°C) 1/8˝ NPT Lead Wires 42295

Polypropylene2 Polypropylene(Hollow) 1˝ 13/16˝

(20.6 mm) .60 50 psi(3 bar)

-40°F to +225°F(-40°C to +107°C)

1/8˝ NPT Lead Wires 1425053/8˝-16 Lead Wires 171517

-40°F to +176°F(-40°C to +80°C)

G 1/8˝-28 Cable 171518M12x1.75 Cable 189739

Polypropylene3

NSF Std. C-2(Kynar float

retaining clip)

Polypropylene3

(Hollow)NSF Std. C-2

1˝ 13/16˝(20.6 mm) .60 50 psi

(3 bar)-40°F to +225°F

(-40°C to +107°C)


G 1/8˝-28 Lead Wires 209460M12x1.75 Lead Wires 209465

Polypropylene2 Polypropylene(Solid)

1˝ 9/16˝(14.3 mm) .90

150 psi(10 bar) @68°F (20°C)

-40°F to +150°F(-40°C to +66°C)


-40°F to +176°F(-40°C to +80°C) M12x1.75 Cable 189787

3/4˝ 7/16˝(11.1 mm) .95 Atmospheric -40°F to +212°F

(-40°C to +100°C) 1/8˝ NPT Lead Wiresor Cable 201540

Nylon Buna1˝ 13/16˝

(20.6 mm) .45 150 psi(10 bar)

-40°F to +250°F (oil)(-40°C to +121°C [oil]) 1/8˝ NPT Lead Wires 162745

-40°F to +176°F (water)(-40°C to +80°C [water]) M12x1.75 Cable 189786

3/4˝ 11/16˝(17.5mm) .85 150 psi

(10.3 bar)-40°F to +250°F (oil)

(-40°C to +121°C [oil]) 1/8˝ NPT Lead Wire 177818

PVDF PVDF 1˝ 1/2˝(12.7 mm) .86 50 psi

(3 bar)-40°F to +250°F

(-40°C to +121°C) 1/8˝ NPT Teflon JacketedLead Wires 173250

2-3/32˝(53.2 mm)

1-9/16˝(39.7 mm)

1˝(25.4 mm)

1/8˝ NPT

1/2˝ HEX

3/4˝ DIA(19 mm)

L1†

17/32˝(13.4 mm)

How To Order – Select Part Number based on specifications required.

– Stock Items.Notes:1. Based on a liquid specific gravity of 1.0.2. All Polypropylene units carry a Kynar retaining clip. Accessories Available in OEM Quantities: Jam Nut, Gaskets, and Slosh Shields.3. NSF C-2 Approved unit, for water use only.

3/4˝ Diameter Floats for Tiny TanksOur smallest LS-3 yet! Reliable alternative to more expensive electronic sensors. Fits smaller devices. Less material, lower cost. Proprietary float more buoyant than competitors.

Small yes, but with BIG performance. No other 3/4˝ float switch on the market matches our LS-3 specs. These units are ideal for potable water, medical devices and other compact appliances, such as printers. Gems proprietary float enables use in lighter-than-water fluids. NSF/ FDA compliant models available at your request. Please consult factory.

SpecificationsWetted Material Stem and Mounting P/N 201540 Polypropylene with Kynar retaining clip P/N 177818 Nylon Float P/N 201540 Polypropylene P/N 177818 Buna-NOperating Temperature, Max. P/N 201540 212°F (100°C) P/N 177818 250°F (121°C) oil, -40°F to +176°F (-40°C to +80°C)Pressure, Max. P/N 201540 Atmospheric P/N 177818 150 psi (10.3 bar)

Actual Size

Dimensions

† L1= Actuation Level (see chart above)

Order by Part Numbers:LS-3, 3/4˝ Polypropylene Float: 201540LS-3, 3/4˝ Buna–N Float: 177818

FLOAT TYPE


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Order By Part Number 142545 46999 76707

Materials

Stem and Mounting All Polypropylene (Including Shield4) Polysulfone All Polysulfone (Including Collar)

Float Polypropylene (Solid) Polysulfone Buna N

Other Wetted — Brass, Aluminum, Polycarbonate, Viton A Epoxy

Min. Liquid Sp. Gr. .90 .75 —

Operating Temperature -40°F to +150°F (-40°C to +65.6°C) -40°F to +120°F (-40°C to +48.9°C) -40°F to +180°F (-40°C to +82.2°C)

Pressure, PSI, Max.3 150 50

Switch1, SPST 20 VA, N.C./N.O. Dry2 20 VA, N.C. Dry

Electrical Termination No. 22 AWG, 22˝ L., PVC Lead Wires No. 22 AWG, 72˝ L., Polymeric Lead Wires No. 22 AWG, 72˝ L., PVC Lead Wires

9/16˝(14.3 mm)†

1-1/4˝ DIA.(31.7 mm)

17/32˝(13.4 mm)

2-3/32˝(53.2 mm)

1/2˝ HEX(12.7 mm)

1/8˝ NPT

1-9/16˝(39.7 mm)

1-9/16˝ DIA.(39.6 mm)

1/4˝ NPT

1/4˝ NPT

3/8˝-24 NPSM THD.

1-13/16˝(46.1 mm)†

3-15/32˝(88.1 mm)

1-1/4˝(31.7 mm) 1/8˝ NPT

(3.2 mm)

1/2˝ HEX(13 mm)

1.86˝ DIA.(47.4 mm)

25/64˝ (10 mm)

2.09˝(53.1 mm)

15/16˝(23.8 mm)

1-15/32˝(37.3 mm)

0.250˝(6.4 mm)

9/16˝(14.3 mm)†

1-1/4˝ DIA.(31.7 mm)

17/32˝(13.4 mm)

2-3/32˝(53.2 mm)

1/2˝ HEX(12.7 mm)

1/8˝ NPT

1-9/16˝(39.7 mm)

1-9/16˝ DIA.(39.6 mm)

1/4˝ NPT

1/4˝ NPT

3/8˝-24 NPSM THD.

1-13/16˝(46.1 mm)†

3-15/32˝(88.1 mm)

1-1/4˝(31.7 mm) 1/8˝ NPT

(3.2 mm)

1/2˝ HEX(13 mm)

1.86˝ DIA.(47.4 mm)

25/64˝ (10 mm)

2.09˝(53.1 mm)

15/16˝(23.8 mm)

1-15/32˝(37.3 mm)

0.250˝(6.4 mm)

1/8”-27 NPSM TH’D

STEM

FLOAT

ACTUATIONLEVEL L1=3/4”

#22 AWG WIRE, POLYMERIC72”-78” EXT.

1 9/16”DIA. REF.

1/4” NPT REF.(2) PLACES

3 1/2” REF.

Unique Features Make These LS-3 Models SpecialThese small switches feature unique configurations for special applications.

Part No. 142545With Slosh Shield

Part No. 46999Bottle Level

Part No. 76707 For Low Level

Compact, all-polypropylene switch with slosh shield is ideal for use with turbulent liquids in small tanks. FDA compliant materials.

For external mounting on tanks too small to accommodate internally mounted switches. (See note below)

For detecting levels as low as 5/8˝ from tank bottom. Use in water, some oils and chemicals.

Cut-away version shown

Notes:1. See “Electrical Data” on Page X-5 for more information.2. Switch operation is selectable, N.O. or N.C., by inverting the float on the unit stem.3. Maximum pressure at 70°F (21°C).4. Consult factory for other available materials.† L1= Switch actuation level, nominal (based on a specific gravity of 1.0).

Note: LS-3 Series Bottle Level Switch is also available with any of the float materials shown on opposite page. Contact GEMS for correct part number.

– Stock Items.


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1/2˝ NPT

2-7/8˝(73 mm)

5/8˝ (16 mm)WRENCH FLAT

19/64˝(7.5 mm)

6˝ TO 8˝(254 TO 305)

2.32(59.01)

1.89 REF(48.01)

0.77(19.56)

Ø 0.84 REF(21.34)

FLOAT ASSEMBLY

0.88 REF(22.29)

ACTUATIONLEVEL (WATER)

STEM

HEX, 11.8mmACROSS FLATS

O-RING

NUT

M8 X 1.25THREAD

LS-7 with 5 Amp Relay O-Ring Sealed, Water Resistant J-BoxAn SPDT relay enables this LS-7 to control two independent loads up to 5 amps each. Switching N.O. for one load and N.C. for the other. This unit is designed to operate with a load connected to each of the two outputs. These loads must be 10 watts, minimum, for correct SPDT switching. One load used alone must be connected to the N.O. terminal. With this load, which may be less than 10 watts, the unit will operate the same as an SPST unit.

Specifications Wetted Materials PolypropyleneMin. Liquid Specific Gravity 0.55Operating Temperature -40°F to +250°F (-40°C to +121°C)Operating Pressure 100 psi @ 70°F, max.Float Arc Envelope 1.50˝J-Box with 5A Relay 120 VAC 50/60 Hz Contacts: 5A – 240 VAC Res 1/3 HP – 120 VAC 5A – 28 VDC Res

Order by Part Number: 181291

LS-1 – Miniature Level Switch Extremely Compact Easy Installation Low CostThis miniature level switch feature an all-polypropylene stem and float construction for broad chemical compatibility. Fluted stem resists solids build-up. Float is held in place with integral stem tangs, which simultaneously eliminates a separate retaining ring and makes inverting the float for reversing switch actuation very easy.

Specifications Wetted Materials Stem and Float Polypropylene O-Ring EPDMMounting Threads M8 x 1.25˝Min. Liquid Specific Gravity 0.70Operating Temperature 0°F to 175°F (-17°C to +79°C)Operating Pressure 0 to 5 psig (0 to 0.3 bar)Electrical Termination 22 AWG, 6˝-8˝ PVC Jacketed Lead Wires (Black)Switch Operation N.O. Dry (May be converted to N.C. Dry by inverting float on stem)Mounting Attitude Vertical with lead wires up.

Order by Part Number: 602881

Dimensions

Dimensions

FLOAT TYPE


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Type 3Internal Mounting

Type 5External Mounting





Polypropylene or Nylon. Polypropylene or Nylon. Polypropylene or Nylon; conduit connection.

Externally mounts through and seals non-threaded holes using a HNBR compression gasket.

Side mount “Drop Down” design for calcifying hot water applications. NSF and WRC compliant Noryl®.

Polypropylene or Nylon.

Note: Recommended hole size = 7/8˝ dia. x 1/32˝ - 5/32˝ thick panel.

Media Compatibility

Media LS-7 Compatible Types

Oil, Fuel, Hydrocarbons Nylon

Broad Range of Chemicals and Water Polypropylene

Limited Chemicals and Water Noryl®

ZIP CORDLEADWIRES,

24˝EXTENDED

5/8˝ -11 THREAD

2-3/4˝(69.8 mm)LOCKING NUT

(NYLON)

3.84˝(97.5 mm)

GASKET(WHITE BUNA N

INCLUDED)

ZIP CORD STYLE24˝ LEADWIRES

5/8˝ HEX1/2˝ NPT

2-7/8˝(73 mm)

5/8˝(16 mm)

4-1/4˝(108 mm)

N.O.

N.C.

LEADWIRES,

24˝EXTENDED

1/2˝ NPT

5/8˝ (16 mm)WRENCH FLAT

19/64˝(7.5 mm)

2-7/8˝(73 mm)

4-1/2˝(114 mm)

N.C. ACTUATION RANGE25˝ to .50˝

MAGNET

45/64˝ REF.

WATER

FLOAT PIVOTS STAY ABOVE WATER

Small Size – Engineered PlasticsLS-7 Series–Compact Side Mounts are the Solution to Many Small TanksThese low-cost units are ideal for high volume use in small tanks and vessels. Engineered plastics construction offers broad compatibility in water, oils and chemicals.

Common SpecificationsSwitch Rating*: SPST, 20VA

Lead Wire Gauge: No. 22 AWGApprovals: All LS-7 Series switches on this page are U.L. Recognized – File No. E45168,

and are CSA Listed-File No. 30200. For NSF approved level switches contact Gems.Mounting Attitude: Horizontal.*See “Electrical Data” on Page X-5 for more information.

Food Warmer

Switch OperationDepending on the mounting position, the float on these switches can rise or lower with the liquid level. By rotating the switch 180°, the switch operation can be Normally Open or Normally Closed (except Type 12).

Normally OpenFLOAT ARC ENVELOPE

Normally Closed

When the switch is mounted so that the float lowers with the liquid level, the switch is N.O.

When the switch is mounted so that the float rises with the liquid level, the switch is N.C.

Types 3, 5, 7, 10 and 13 Type 12 – N.C. “Drop Float” Design

The LS-7 Type 12 is ideal for use on food warmers, hot water heaters, steam cookers, small boilers or wherever water evaporation occurs. The switch is used effectively for either high fluid level alarms or water make up systems. The units are made of Noryl®, which carries both NSF and WRC approval for use in potable water, and are supplied with FDA-approved Buna gaskets.


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Internal MountingType 5

External MountingType 7



Internal MountingType 13

Internal Mounting

Polypropylene or Nylon. Polypropylene or Nylon. Polypropylene or Nylon; conduit connection.

Externally mounts through and seals non-threaded holes using a HNBR compression gasket.

Side mount “Drop Down” design for calcifying hot water applications. NSF and WRC compliant Noryl®.

Polypropylene or Nylon.

Note: Recommended hole size = 7/8˝ dia. x 1/32˝ - 5/32˝ thick panel.

MountingType

Materials* Min.LiquidSp. Gr.

Operating Temperature Operating Pressure, Max.

FloatArc

Envelope

PartNumberStem and

Mounting Float Lead WireJacket

3Nylon

TPE†.65 -40°F to +250°F (-40°F to +121.1°C) 100 psi

@ 70°F 2.20165570

Polypropylene .55 -40°F to +225°F (-40°C to +107.2°C) 164520

5Polypropylene

TPE†.55 -40°F to +225°F (-40°C to +107.2°C) 100 psi

@ 70°F 1.25131100

Nylon .65 -40°F to +250°F (-40°F to +121.1°C) 140620

7Polypropylene

TPE†.55 -40°F to +225°F (-40°C to +107.2°C) 100 psi

@ 70°F 1.50160450

Nylon .65 -40°F to +250°F (-40°F to +121.1°C) 160460

10Polypropylene

TPE†.55 -40°F to +225°F (-40°C to +107.2°C) 50 psi

@ 70°F 2.08165800

Nylon .65 -40°F to +250°F (-40°F to +121.1°C) 16590012 Noryl® TPE† .80 -40°F to +225°F (-40°C to +107.2°C) 100 psi @ 70°F .70 19108013 Polypropylene TPE† .55 -40°F to +225°F (-40°C to +107.2°C) 100 psi @ 70°F 2.20 197050

N.O.N.C.

GASKET, HNBR (FDA Compliant)

NUT, 5/8˝-11

.85˝ DIA.(21.6 mm)

.90˝(23 mm)

.10˝(2.5 mm)

1.48˝(37.6 mm)

3.85˝(97.8 mm)

4.093˝(104 mm)

.33˝(8.4 mm)

11/16˝ DIA.(18 mm)

1-5/64˝(27 mm)

BUNAGASKET

3-59/64˝ REF.(100 mm)

2-23/32˝ REF.(69 mm)

5/8˝-11THREAD

ZIP CORDLEAD WIRES24˝ - 26˝ EXTENDED

LOCKINGNUT

3-51/64˝(94 mm)

ZIP CORD LEADWIRES24˝EXTENDED

1/2˝ WRENCH FLATS

9/16˝-24 THD.

JAM NUT (NYLON)

GASKET (BUNA 'N')

2-43/64˝(69 mm)

1-1/8˝ (29 mm)

N.O.N.C.

Nylon is ideal for oils and fuels.

NSF Standard 61 polypropylene is ideal for potable water and broad chemicals.


* Polysulfone and Ryton® R-4 are available upon request. † Thermoplastic Elastomer Zip Cord, 22 AWG. Note: NSF C2 Versions available. Contact factory.

– Stock Items.

See alloy versions on next page.

FLOAT TYPE


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LEAD WIRES,24˝ EXTENDED

1.40˝(36 mm) REF.

3.38˝(86 mm) REF.

11/16˝(17 mm) REF.

7/8˝ (22 mm)-14UNF THD

7/8˝ (22 mm)-14 JAM NUT

#22 AWG ZIP CORD LEAD WIRES24˝ EXTENDED

5/16˝ REF.(8 mm)

1.00˝ HEX

1/2˝ NPT

3-29/32˝ REF.(99.2 mm)

1-1/32˝ REF.(26.2 mm)

LEADWIRES,

24˝EXTENDED

1/2˝ NPT

5/8˝ WRENCHFLAT

5-5/16˝ REF.(135 mm)1-5/8˝ REF.

(41.3 mm)5/8˝ DIA. REF.

(15.9 mm) LEAD WIRES,24˝ EXTENDED

.83 REF.(21 mm)

4-9/16˝ REF.(116 mm)

5/8˝ (16 mm)DIA. REF.

5/8˝ (16 mm)-11 JAM NUT

WITH VITON GASKET

5/8˝ (16 mm)-11 THD

Small Size - Alloys

LS-7 Series - Compact Alloy and Alloy/Plastics Side MountsBuilt for durability, our LS-7 Series switches utilize stainless steel, or zinc bodies. Ideal for any small tank or vessel destined for a

rugged environment.

All-stainless steel material of construction of Types 9 and 11 is generally recognized as safe with FDA for food contact regulations.

Type 6 – External Mounting Type 8 – External Mounting

Polysulfone float. Zinc alloy body with polypropylene or nylon float. SAE Mounting.

Zinc alloy body with nylon or polypropylene float.

Type 9 – External Mounting

316 Stainless Steel body with 316 SS, nylon or polypropylene float.

Type 11 – Internal Mounting

316 Stainless Steel body with 316 SS float.

DimensionsType 6 Type 8

Common SpecificationsSwitch Rating*: SPST, 20VA Lead Wire Gauge: No. 22 AWGMounting Attitude: Horizontal.*See “Electrical Data” on Page X-5 for more information.

Type 9 Type 11


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MountingType

Materials Min.LiquidSp. Gr.

Operating Temperature OperatingPressure, Max.

Float ArcEnvelope

PartNumberStem and

Mounting Float Lead WireJacket

6 ZincAlloy*

NylonTFE†

.65 -40°F to +250°F (-40°C to +121°C) 100 psi @ 70°F 1.36 155660

Polypropylene .75 -40°F to +225°F (-40°C to +107°C) 150 psi @ 70°F 1.36 179870

8 ZincAlloy*

NylonTFE†

.65 -40°F to +250°F (-40°C to +121°C) 100 psi @ 70°F 1.40 160950


9316

StainlessSteel

316 S.S.

TFE†

.80 -40°F to +300°F (-40°C to +149°C) 300 psi @ 70°F 1.43 164870

Nylon .65 -40°F to +250°F (-40°C to +121°C) 100 psi @ 70°F 1.40 164850


11 316 Stainless Steel Teflon® .80 -40°F to +300°F (-40°C to +149°C) 300 psi @ 70°F 1.65 179445

Switch OperationDepending on the mounting position, the float on these switches can either rise or lower with the liquid level. By rotating the switch 180°, the switch operation can be Normally Open or Normally Closed.

Normally OpenFLOAT ARC ENVELOPE

Normally Closed

When the switch is mounted so that the float rises with the liquid level, the switch is N.C.When the switch is mounted

so that the float lowers with the liquid level, the switch is N.O.


†Thermoplastic Elastomer Zip Cord. – Stock Items.

*Zinc Alloy Material Note:When mounted in certain cathodic metals, including stainless steel, and used in water-based liquids, galvanic corrosion may occur. Consult factory for information.

FLOAT TYPE


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Material

SeriesNumber

Stem andMounting Float Other

WettedMin. Liquid

Sp. Gr. Operating Temperature Pressure,PSI, Max.**

Switch*SPST

PartNumber

LS-1700

BrassBuna N

316 S.S.,Epoxy

.45 Water: to 180°F (82.2°C)Oil: -40°F to +300°F (-40°C to +149°C) 300

20 VA 01701

316 S.S. 20 VA 01702

316 S.S. Teflon® .85 -40°F to +250°F (-40°C to +121.1°C) 100020 VA, N.O. 26791

20 VA, N.C. 27980

LS-1750 316 S.S. 316 S.S. 316 S.S. .70-40°F to +300°F (-40°C to +148.9°C)

10020 VA 01750

-40°F to +480°F (-40°C to +204.4°C) 20 VA 79990

LS-1755 316 S.S. 316 S.S. 316 S.S. .90 -40°F to +300°F (-40°C to +148.9°C) 275 20 VA 01755

seireS0071-SL seireS0571-SL seireS5571-SL

taolFNanuB taolFnolfeT metSdnataolFleetSsselniatS

1" DIA.(25.4 mm)

1"(25.4 mm)

2-1/16"(52.4 mm)

L1†

1/2" HEX(12.7 mm)

1/8" NPT

1-1/2"(38.1 mm)

1" DIA.(25.4 mm)

3/4"(19.1 mm)

2-1/16"(52.4mm)

L1†

FLAT WASHER

SPRING

1/2" HEX(12.7 mm)

1/8" NPT

1-1/2"(38.1mm)

1-1/2" DIA.(38.1 mm)

1"(25.4 mm)

2-1/16"(52.4 mm)

L1†

1-1/2"(38.1mm)

1/2" HEX(12.7 mm)

1/8" NPT

1-1/32" DIA.(26.2 mm)

1-7/32"(31.0 mm)

2-21/64"(59.1mm)

L1†

1-45/64"(42.8mm)

1/2" HEX(12.7 mm)

1/8" NPT

®

Small Size – AlloysRugged Durability, With Broad Heat and Pressure Capabilities, are Hallmarks of These Compact SwitchesIdeal for shallow tanks or restricted spaces, or for low-cost, high volume use.

LS-1700 Series – Buna N Float

LS-1700 Series – Teflon® Float

Offer broad chemical compatibility for general purpose use. Also ideal for oils and water.

LS-1750 Series – All Stainless Steel

Rugged construction suitable for most corrosive liquids, and for high temperatures and pressures. Stainless steel is generally recognized as safe (GRAS) with FDA for food contact regulations.

LS-1755 Series – All Stainless Steel

Dimensions

L1= 37/64˝ (14.5 mm) N.O.; 53/64˝ (20.8 mm) N.C.L1= 9/16˝ (14.2 mm) N.O.; 13/16˝ (20.6 mm) N.C. L1= 1/2˝ (12.7 mm) N.O. and N.C. L1= 5/8˝ (15.7 mm) N.O.; 3/4˝ (19.1 mm) N.C.

† L1= Switch actuation level, nominal (based on a liquid specific gravity of 1.0).

Common SpecificationsElectrical Termination: No. 22 AWG, 24˝ L., Polymeric Lead Wires, (except Part No. 79990 which has Teflon® Lead Wires).Approvals: Series Nos. LS-1700, LS-1750 and LS-1755 are U.L. Recognized – File No. E45168 and CSA Listed – File No. 30200.Switch Operation: Units are shipped N.O. unless otherwise specified. Selectable, N.O. or N.C., by inverting float on unit stem (except for LS-1700 Series switches with Teflon® Floats; see selection in “How to Order” table).


* See “Electrical Data” on Page X-5 for more information. ** Higher pressures are temperature dependent.


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Materials

Type Stem and Mounting Float Min. LiquidSp. Gr. Operating Temperature Pressure,

PSI, Max.Part

Number

I

Brass 316 Stainless Steel.70 -40°F to +300°F (-40°C to +149°C) 100

117711

316 Stainless Steel 117712

BrassBuna N .45 Water: to 180°F (82°C)

Oil: -40°F to +300°F (-40°C to +149°C) 300118125

Stainless Steel 118126

II

Brass 316 Stainless Steel.70 -40°F to +300°F (-40°C to +149°C) 100

117715

316 Stainless Steel 117716

BrassBuna N .45 Water: to 180°F (82.2°C)

Oil: -40°F to +300°F (-40°C to +149°C) 300118127

Stainless Steel 118128

15/16"(23.8 mm)

L1

1-3/4"(44.5 mm)

BUNA NFLOAT

1/8" NPT

1/2" HEX.(12.7 mm)

1" DIA.(25.4 mm)

3-1/4"(82.6 mm)

15/16"(23.8 mm)

L1

1-3/4"(44.5 mm)

BUNA NFLOAT

1/8" NPT

1/2" HEX.(12.7 mm)

1" DIA.(25.4 mm)

3-1/4"(82.6 mm)

RED

REDN.O. DRY(N.C. DRY AVAILABLE)

When mounted stem up, units are N.C. dry

LS-77700 Series – Bent Stem Switches Provide Greatest Buoyancy Of Any Side Mount VersionThese units perform in liquids with specific gravities as low as .45; switches protrude into tank less than 3 inches.

Dimensions

Type I – 1/8˝ NPT Type II – 3/8-24˝ Thread

L1 Dimension (based on liquid specific gravity of 1.0):Buna N Float: 2-3/8˝ (60.3 mm) ± 3/16˝Stainless Steel Float: 2˝ (50.8 mm) ± 3/16˝

Common SpecificationsElectrical Termination: No. 22 AWG, 24˝ L., Teflon® Lead WiresApprovals: U.L. Recognized – File No. E45168Switch* SPST: 20 VA, 120-240 VAC. Switch is N.O. (Dry), but available N.C. (Dry). Mounting Attitude: Vertical ± 30°.Other Wetted Materials: Float Stop is Berylium Copper or PH-15-7-MO Stainless Steel.Grooved Stem Option: Stem may be grooved to prevent accidental or vibrational movement of float stops (grip rings).

Type ll version shown.

Typical Wiring Diagram

When mounted “stem up,” units are N.C. dry.

Typical Installation

Type I Type II

Shown with Buna N float. Threads into NPT boss.

Shown with stainless steel float. Mounts directly through tank wall.


*See “Electrical Data” on Page X-5 for more information.

– Stock Items.

FLOAT TYPE


LEVEL SWITCH

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LS-74780 LS-1900TFE LS-1700TFE

SeriesNumber

MaterialsMin. Liquid

Sp. Gr. Operating TemperaturePressure,

PSI,Max.

Switch*Part Number

Stem, Mountingand Other Wetted Float

Mounting Size1/4˝ NPT 1/8˝ NPT

LS-74780 CPVC .85 -40°F to +180°F (-40°C to +82.2°C) 15 SPST, 20 VA 74780** —LS-1900TFE Teflon® .80 -40°F to +300°F (-40°C to +148.9°C) 30 SPDT, 20 VA 133299 —

LS-1700TFE PTFE .86 +32°F to +212°F (0°C to +100°C) 25SPST, 20 VA, N.O. — 174100SPST, 20 VA, N.C. — 174200

1-1/2˝ DIA.(38.1 mm)

3-7/16˝(87.3 mm)

5/8˝ HEX(15.9 mm)

1/4˝ NPT21/32˝

(16.7 mm)

3/4˝(19.1 mm)†

1-13/16˝(46.0 mm)

2-25/32˝(70.6 mm)

PVC JACKETEDLEAD WIRES

2-1/8˝ DIA.(54 mm)

3-15/32˝(88.1 mm)

21/32˝ HEX(16.7 mm)

1/4˝ NPT13/16˝

(20.6 mm)

.92˝(22.3 mm)†

1-15/16˝(49.2 mm)2-21/32˝

(67.5 mm)

TEFLON JACKETEDLEAD WIRES

® WIRE. 22 AWG.TEFLON JACKETED

24˝ TO 26˝(610 mm to 660 mm)EXTENDED LENGTH

1/2˝ HEX. REF.(12.7 mm)

1/8˝ NPT REF.

#174106. RETAINING

CLIP

#174105. FLOAT

5/16˝ DIA. REF.(7.9 mm)

1-1/8˝ DIA. REF.(28.5 mm)

1-31/32˝ REF.(50.0 mm)

2-1/2˝ REF.(63.5 mm)

ACTUATIONLEVEL

5/8˝ REF.(15.9 mm)

Large Size – Engineered PlasticsSelect from these Engineered Plastics for Aggressive or Ultra-Pure LiquidsEach of these series offers unique features. Choose from this selection when all-plastic material is desirable and tank space is not restricted.

LS-74780 – All CPVC

Particularly well suited for rough service. Ideal for use in chemical and plating applications.

LS-1900TFE

Resists build-up of foreign material or sticky media. Float travel remains uninhibited in viscous or corrosive liquids. SPDT switch.

LS-1700TFE

A medium-size solution for ultra-pure liquid level sensing. Made of corrosion resistant PTFE for low particle generation.

Dimensions

†L1=Switch actuation level, nominal (based on a liquid specific gravity of 1.0 and N.O. dry circuit–dimension will vary for N.C. circuit).

Common SpecificationsElectrical Termination: No. 18 AWG, 24˝ L., Lead Wires (Jacket material is indicated on dimensional drawings, above).


* See “Electrical Data” on Page X-5 for more information. ** Switch operation is selectable, N.O. or N.C., by inverting the float on the unit stem. Units are shipped N.O. unless otherwise specified. †† 100 VA switches are not U.L. Recognized.

– Stock Items.


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Material

SeriesNumber


WettedMin. Liquid

Sp. Gr. Operating Temperature Pressure,PSI, Max.

Switch*SPST

PartNumber

LS-1800

Brass Buna N

316 Stainless Steel, Hysol

.75Water: to 180°F (82°C)

Oil: -40°F to +230°F (-40°C to +110°C) 150

20 VA 01801

100 VA** 35651

316 Stainless Steel

Buna N .7520 VA 01807

100 VA** 35657

Teflon® .65 -40°F to +250°F (-40°C to +121°C) 300 20 VA, N.O. 01811

LS-1900

Brass

Buna N 316 Stainless Steel, Hysol

.55Water: to 180°F (82°C)

Oil: -40°F to +230°F (-40°C to +110°C) 150

20 VA 01901

100 VA*** 35676

316 Stainless Steel .55

20 VA 01907

100 VA 35682

seireS0081-SL seireS0091-SL

taolFNanuB taolFn®olfeT taolFNanuB

1-1/4" DIA.(31.7 mm)

2-15/16"(74.6 mm)

1/2" HEX(12.7 mm)

1/8" NPT

17/32"(13.5 mm)

7/8"(22.2 mm)†

1-3/4"(44.5 mm)

2-13/32"(61.1 mm)

1-1/4" DIA.(31.75 mm)

2-15/16"(74.6 mm)

1/2" HEX(12.7 mm)

1/8" NPT

17/32"(13.5 mm)

7/8" (22.2 mm)†

1-3/4"(44.5 mm)

2-13/32"(61.1 mm)

FLAT WASHER

SPRING

1-7/8" DIA.(47.6 mm)

3-3/16"(80.9 mm)

5/8" HEX(15.9 mm)

1/4" NPT

21/32"(16.7 mm)

1-3/16"(30.2 mm)†

1-13/16"(46.1 mm)2-17/32"

(64.3 mm)

Large Size – AlloysLS-1800 and LS-1900 Series are a Step Above Our Plastic Units for Pressure CapabilitiesExcellent stability for general use in oils and water.

LS-1800 Series –Buna N Float

LS-1800 Series –Teflon® Float

LS-1900 Series –Buna N Float

Intermediate in size, LS-1800 switches provide long life and dependability to meet a broad range of requirements.

With large float displacement, switch withstands rough service; is suitable for high viscosity liquids.

Dimensions

†L1 = Switch actuation level, nominal (based on a liquid specific gravity of 1.0).

Common SpecificationsElectrical Termination: No.18 AWG, 24˝ L., Polymeric Lead Wires.Approvals: All Switches on this page are U.L. Recognized – File No. E45168, and are CSA Listed – File No. 30200.Switch Operation: Selectable, N.O. or N.C., by inverting float on unit stem (except for LS-1800 Series switch with Teflon® float). Units are shipped N.O. unless otherwise specified.


*See “Electrical Data” on Page X-5 for more information.**LS-1800 100 VA switches are not U.L. Recognized.

*** LS-1900 100VA unit is UL Resistive Rated.

FLOAT TYPE


LEVEL SWITCH

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Materials

SeriesNumber

Stem andMounting Float Min. Liquid

Sp. Gr. Operating Temperature Pressure,PSI, Max. Switch1 Part

Number

LS-1950 316 Stainless Steel 0.75-40°F to +300°F (-40°C to +149°C)

750

SPST, 20 VA 01950

SPST, 100 VA2 26717

-40°F to +480°F (-40°C to +249°C) SPST, 20 VA 79999

2-1/16" DIA.(52.4 mm)

1/4" NPT

2-3/4"(69.8 mm)

1-3/32"(27.8mm)†

3-3/8"(85.7 mm)

5/8" HEX(15.9 mm)

NORM. OPEN

NORM. CLOSED

5/8"(15.9 mm)

Large Size – AlloysLS-1950 – All Stainless Steel For High Pressure and TemperatureFor high performance applications, the LS-1950 provides high tempera-ture and pressure capabilities. Materials of construction comply with FDA food contact regulations.

Exceptionally accurate and rugged for higher temperatures and in pressurized or corrosive liquids. For oils, water and chemicals.

Dimensions

† L1= Switch actuation level, nominal (based on a liquid specific gravity of 1.0 and N.O. dry circuit – dimension will vary for N.C. circuit).

Common SpecificationsElectrical Termination: No. 18 AWG, 24˝ L., Polymeric Lead Wires (except Part No. 79999 which has Teflon® lead wires).Approvals: LS-1950 Series switches are U.L. Recognized – File No. E45168 and are CSA Listed - File No. 30200 (Part No. 79999 is U.L. Recognized only).Switch Operation: Selectable, N.O. or N.C., by inverting float on unit stem. Units are shipped N.O. unless otherwise specified.

How to Order – Select Part Number based on specifications required.

Notes1. See “Electrical Data” on Page X-5 for more information.2. UL Resistive Rated

– Stock Items.


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Materials

SeriesNumber Housing Stem and

Mounting Float OtherWetted

Min. LiquidSp. Gr.

Pressure,PSIG, Max. Operating Temperature L1 Switch* Part

Number

LS-800-5

Brass316

StainlessSteel

BerylliumCopper

.75

500 @ 70°F-40°F to +300°F

(-40°C to +148.9°C)

3/4˝(19 mm)

SPST, 20 VA 172625

SPST, 100 VA 172986

DPDT 172988

316 Stainless SteelS.S.

ARMCO H-15-7 MO

750 7/16˝(11 mm)

SPST, 20 VA 172635

DPDT 172987

LS-159000 Aluminum Brass316 S.S. Beryllium

Copper .90 600 @ 70°F -40°F to +300°F(-40°C to +148.9°C) See

Dimensions SPST, 20 VA144080

Buna N Viton® .50 250 @ 70°F -40°F to +250°F (oil); +180°F (water)(-40°C to +121°C [oil]; +82°C [water]) 160405

leetSsselniatSdnassarB–5-008-SL 000951-SL

3/4" NPT PORTS (2X)

4-1/4" (107.9 mm)

2-1/2" (63.5 mm)

1/2" FNPT

VITON® 0-RING

1/4"-20THD (2PLCS)

2-5/8" (66.7mm) DIA. REF.

L1 SWITCH ACTUATION LEVEL†

(SEE ORDER TABLEFOR VALUE)

2-1/4"-12 UNF-2A THR'D

7" N.O.

N.C.

(48 mm)

(83 mm)

1/8"-27 NPTOUTLET PORT

1-5/16"-12UNF THREAD, REF.

FLOAT ASSEMBLY(SPHERICAL SHOWN)

1/4"-18 NPTINLET PORT

3/16"

ACTUATION LEVEL

1-5/16" (33 mm) ±1/8"2-1/4" REF.

1-7/8" REF.

3-1/4"

2-3/4" REF.

1-1/2" HEX

(5 mm)

(70 mm)

(57 mm)

(38 mm)

O-RING

Large Size – AlloysWhen a Switch Won’t Fit In the Tank, Use a Non-Intrusive Bottle TypeBottle type level switches are ideal for large or small tanks or where access to the inside is impractical or impossible. These units mount completely outside of the tank, at the level actuation point.

LS-800-5 Series – Single Level,Brass or Stainless Steel Housing

LS-159000 Series – Low Cost, Compact Aluminum Housing

3/4˝ NPT Ports Inline NPT Ports

Relative size compared tounit at left.

For Remote Alarms – See Page E-29• Adjustable Volume• Indoor Outdoor• Solid-State

Dimensions

†L1= Switch actuation level, nominal (based on a liquid specific gravity of 1.0).

Common SpecificationsElectrical Termination: No. 18 AWG, 24˝ L., Polymeric Lead Wires (LS-800-5) / No. 22 AWG, 24˝ L., Polymeric Lead Wire (LS-159000).Approvals: Series Nos. LS-800-5 and LS-159000 are U.L. Recognized – File No. E45168 and CSA listed – File No. LR-30200.Switch Operation: Selectable, N.O. or N.C., by inverting float on unit stem.Mounting Attitude: Vertical with lead wires up.

How To Order - Select Part Number based on specifications required.

* See “Electrical Data” on Page X-5 for more information. DPDT relay information is with Dimensions above.

FLOAT TYPE


LEVEL SWITCH

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UL Approved

Explosion-Proof


3-7/8"±1/8"(98.4 mm)

2-3/8"±1/8"(60.3 mm)

1" NPT5/8"†

(15.9 mm)

APPROX. ACTUATION LEVEL CONTACTS TRANSFER ON ASCENDING FLUID LEVEL (±1/4" OF ) C L

3-7/16"(87.3 mm)

1/2" NPT

1-3/8"(34.8 mm)

UP

7/8"(22.2 mm)

4-1/8" APPROX.

(104.8 mm)2" DIAMETER BALL FLOAT

3-5/8" APPROX.(92.0 mm)

1" NPT1"†

(25.4 mm)

APPROX. ACTUATION LEVEL CONTACTS TRANSFER ON ASCENDING FLUID LEVEL

5-1/16" (128.6 mm)

5-9/32" (134.1 mm)

APPROX.

3-1/4" (82.5 mm)APPROX.

1" NPT1"†

(25.4 mm)

APPROX. ACTUATION LEVEL CONTACTS TRANSFER ON ASCENDING FLUID LEVEL

5-1/16" (128.6 mm)

3-1/2"DIA. REF.

13/16" REF.

1/2" NPT PORTS

Side View

Top View

Large Size – Alloys Side Mounting Switches Solve the Problem of Inaccessible Tank Tops & BottomsThese units solve the problem of point level sensing in tanks with inaccessible tops or bottoms, or at intermediate locations in larger tanks. Operation is positive and dependable. The float pivots with changing liquid level, displacing a shuttle which magnetically actuates a hermetically sealed switch within the unit. Installation is through the tank side at the detection point.

Typical Installation

LS-2050 Series – Brass and Buna N LS-2050 Series – All-Stainless Steel LS-52100 Series – All Stainless Steel

General purpose materials designed to provide reliable service in oils and water.

Ultimate strength: for pressures to 900 PSIG and temperatures to 300°F (148.9°C). Explosion-proof models available.

Rugged, all-stainless steel unit offers broad chemical compatibility at temperatures to 300°F (148.9°C). Explosion-proof models available.

Dimensions

† Approximate de-actuation level, nominal (based on a liquid specific gravity of 1.0). * Switch Mounting dimensions are the same as shown on the LS-2050 Series drawing (far left).

Explosion-Proof VersionsCSA or FM Approved versions are available in all-stainless steel configurations only.Typical Example (P/N 55690 Shown):

For Remote Alarms – See Page E-29• Adjustable Volume• Indoor Outdoor• Solid-State


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SeriesNumber

Materials

Switch1

Part Numbers


Wetted

StandardVersions

With Bellows(Details Below)

Explosion-Proof

LS-2050

Brass Buna N316 Stainless Steel,Beryllium Copper,Teflon®, Ceramic

SPDT, 20 VA 30288 — —

316Stainless

Steel

316Stainless

Steel

Stainless Steel,Teflon®, Ceramic

SPDT, 20 VA 30290 175650 55690

SPST, 100 VA, N.O.2, 4 48068 — —

SPST, 100 VA, N.C.2, 4 48069 — —

LS-52100316

StainlessSteel

304Stainless

Steel

430 Stainless Steel,Teflon®, Ceramic

SPDT, 20 VA 52100 — 121753

SPST, 100 VA, N.O.3 116971 — —

SPST, 100 VA, N.C.3 116972 — —


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FM

Common SpecificationsElectrical Termination: No.18 AWG, 24˝ L., Polymeric Lead Wires.Approvals: LS-2050 Series Switches are U.L. Recognized – File No. E45168 and are CSA Listed. Explosion-proof units are approved for Class I, Division 1, Group D hazardous areas.Mounting Attitude: Horizontal, ±15°.

Performance


Notes1. See “Electrical Data” on Page X-5 for more information.2. Not CSA Approved.3. Not U.L. Recognized or CSA Approved.4. UL Resistive Rated

– Stock Items.

FLOAT TYPE


LEVEL SWITCH

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1-1/4˝ NPT 2˝ NPT

Material Part Numbers

Brass 26034 24408

316 Stainless Steel 26033 24407

Float Material Buna N 316 Stainless Steel

Compatible Mounting Type 1-1/4˝ NPT 2˝ NPT

Float Dimensions

Operating Temperature Water: to +180°F (+82°C); Oil: -40°F to +230°F (-40°C to +110°C) -40°F to +275°F (-40°C to +135°C)

Pressure, PSI, Max. 150 750

Min. Media Specific Gravity .75 .55 .75

Mounting Size Switch Type Tubing Material Part Number A Dim. Part Number A Dim. Part Number A Dim.

1-1/4˝ NPT

SPST20 VA

Brass 26609 4˝(101.6 mm)

— — — —Stainless Steel 26608

SPDT20 VA

Brass 26737 4-29/64˝(113.0 mm)Stainless Steel 26738

2˝ NPT

SPST20 VA

Brass

— —

24410 4˝(101.6 mm)

— 4-1/4˝(107.9 mm)Stainless Steel 25328 24411

SPDT20 VA

Brass 24578 4-29/64˝(113.0 mm)

— 4-29/64˝(113.0 mm)Stainless Steel 25329 24579

1-1/2˝(38.1 mm)

1/2˝ NPT 1-1/4˝(31.7 mm)

1-1/4˝(31.7 mm)

1/2˝ NPT 1˝ (25.4 mm)

A 1-3/4˝(44.5 mm)

1-3/16˝ DIA.(30.1 mm)

A 1-11/16˝(42.9 mm)

1-7/8˝ DIA.(47.6 mm)

A

2-1/16˝ DIA.(52.4 mm)

Large Size – AlloysFABRI‑LEVEL™ Components and Kits Build Into Custom Switches in Minutes GEMS FABRI-LEVEL™ units can be custom-assembled in minutes from standard components, right in your plant. Simple instructions are furnished with kits.

FABRI‑LEVEL™ ComponentsHow to Order: Specify Part Number and quantity of each component required.

Mounting TypesProvides clearance for inserting unit in tank. 2˝ NPT Mounting must be used with stainless steel floats.

Level Station AssembliesEach Station is comprised of a float, tube section and switch.Lead Wires: SPST: #18 AWG, 60˝ L., Teflon®; SPDT: #22 AWG, 60˝ L., Teflon®

* See “Electrical Data” on Page X-5 for more information.

– Stock Items.

Mounting Plug

Tube Con-nector

Tube Union

1/2˝ Tubing

Tube Union

Tube End Fittings

Float, Tube and Switch Station

Float, Tube and Switch Station


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Description(1/2˝ Fittings)

TubeConnector Tube Union Tube End

Fitting90°

Elbow1/2˝ O.D. Tubing

10˝ Length 36˝ Length

Function

Connects tube to mounting plug,

mounts unit from inside of tank.

Connects level stations or

extension tubes.Seals end of unit. For side entry into tank For extending units or

level station spacing.

Material Part Numbers

Brass(Nylon Ferrule) 24633 24412 24553 24631 25199 24637

All-316Stainless Steel 24634 24413 24554 24632 25204 24638

MaterialsMounting NPT Kit Number

Fittings Floats

Brass Buna N1-1/4˝ 26128

2˝ 24576

316 Stainless Steel Buna N1-1/4˝ 26130

2˝ 26675

316 Stainless Steel 2˝ 24577

1-3/4˝ (44.4 mm)

3/8˝ NPT-M

2-1/8˝ (53.9 mm)

1-3/16˝ (30.1 mm)

1-1/2˝ (38.1 mm)

1-1/2˝ (38.1 mm)

Fittings and Tubing

FABRI‑LEVEL™ KitsFABRI-LEVEL Switch Kits contain all components for complete assembly of a 1- or 2- station level switch unit for pipe-plug mounting in your tank. Kits are available in several material and size combinations. N.O. or N.C. operation of the SPST switch is selectable by inverting the float(s) on the unit stem. Two 10˝ (254 mm) lengths of tube are furnished to space level stations as desired. Components available for custom-building other configurations are listed on the facing page and above.

SpecificationsKits use the components listed individually on the facing page and above. Please review for performance and dimensional data.

How To Order Specify Kit Number and quantity.

Warning: Improper application, assembly or installation of FABRI-LEVEL™ Kits or components may result in injuries to personnel or damages.

– Stock Items.

Each Kit Contains:1 Tube Connector1 Mounting Plug2 Level Stations (Switch, Tube, Float)2 Extension Tubes1 Tube End Fitting3 Tube Unions

FLOAT TYPE


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SeriesMaterial

Min. Liq.Sp. Gr. Operating Temperature Pressure

PSI, Max.

Switch1

PartNumberStem and


LevelSPST Temperature3

TH800Temp./Level

Brass Buna NBerylliumCopper,Hysol

.75 Water: to 180°F (82°C)Oil: -40°F to +230°F (-40°C to +110°C) 150 20 VA, N.O.

N.C., open on +150°F ±10°F, incr. 57143

N.O., close on +150°F ±10°F, incr. 57144

LS-38760 Aluminum Buna N S.S., Hysol .55 -40°F to +180°F (-40°C to +82°C) 150 20 VA, N.C. — 38760

LS-270 316 S.S. Buna N

BerylliumCopper,CopperNickel,

Polycarb.304 S.S.

.55 -40°F to +140°F (-40°C to +60°C) 150

20 VA, N.O.

—

43765

20 VA, N.C. 43760

50 VA2, N.O. 43980

50 VA2, N.C. 43982

¡F

hctiwSleveL/erutarepmeT seireS06783-SL seireS072-SL

lacirtcelEnoitanimreT seriWdaeLciremyloP,.L"42,GWA81 seriWdaeLciremyloP,.L"63,GWA81 foorpretawhtiwenerpoeN,.L.tf6,elbaC2/81

noitcennoc

1-1/4" DIA.(31.75 mm)

5-3/32"(129.4 mm)

1-1/2"(38.1 mm)†

1-3/4"(44.5 mm)

4-1/4"(108 mm)

5/8" HEX(15.9 mm)

1/4" NPT27/32"

(21.4 mm)

1-7/8" DIA.(47.6 mm)

4-1/4"(108 mm)

1/4" NPT1-1/16"

(27.0 mm)

1-1/4"(31.8 mm)†

1-13/16"(46.1 mm)

3-3/16"(81.0 mm)

FLOATCUSHION

FLOATCUSHION

3/16" DIA.(4.7 mm)

3-3/16"(81 mm)

1-3/8" ± 1/4"(34.9 mm) †

2-19/32" DIA.(66 mm)

9/32" DIA.(7.1 mm)2 HOLES

SLOSH SHIELD CUT AWAY

2-9/16"(65 mm)

1-3/4"(44.5 mm)

2-1/2"(63.5 mm)

CLOSED

OPENTH800

Specialty SwitchesGEMS Excels in Switches for Special RequirementsThe products below are examples of the custom engineering GEMS can provide to meet specific application needs. These units are ideal for use in oils and water.

TH800 SeriesTemperature/Level Switch

LS-38760 Series –Cushioned Float

LS-270 Series –Bracket Mounting Slosh Shield

U.L. Recognized – File No. E45168

Level monitoring and temperature switch in a single unit. Intermediate in size; single-setting temperature sensor is in bottom of stem.

Cushioned float and switch for turbulent liquids or excessive vibration. Easily grounded. Ideal for tank trucks, construction equipment or mobile applications.

Small, lightweight, and extremely stable in nonstatic, highly contaminated liquids. Slosh shielding minimizes effects of turbulence and helps prevent interference by foreign material. Bracket-mounted to any convenient surface.

Dimensions

Wire diagram on page B-21

†L1= Switch actuation level, nominal (based on a liquid specific gravity of 1.0).LS-270 Series Note: Installed vertically with cable upward. Caution: Elastomer seals in the sensor and cable are subject to deterioration and aging, and therefore need to be checked regularly. Life expectancy of seals varies with application.


Notes:1. See “Electrical Data” on Page X-5 for more information.2. Switches are not U.L. Recognized or CSA Listed.3. See Page B-21 for thermostat ratings and wiring diagram. Other temperature settings are available; consult factory.


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SeriesMaterial

Min. LiquidSp. Gr. Operating Temperature Pressure

PSI, Max. Switch*Electrical

TerminationOption

PartNumberStem and


Portable Brass Buna N Aluminum,316 S.S. .85

Oil: -40°F to +230°F (-40°C to +110°C)Water: to 180°F (82°C)

10 SPST, 20 VAN.O., Dry — 15208

LS-750Brass Buna N

Nylon, PVC,Beryllium Copper

.45 150 SPST, 20 VAN.C., Dry

PVC Cable Jacket 149350

316 S.S.** 316 S.S. PVDF, Viton® .65 -40°F to 212°F (-40°C to +100°C) 375 SPST, 10 VAN.C., Dry

Teflon® Cable Jacket 197433

LS-700F Brass 304 S.S. — .98 -40°F to +221°F (-40°C to +105°C) 400 SPST, 20 VAN.C., Dry

3-Pin 128500

4-Pin 144900

Portable Level Switch LS-750 LS-700F

SJO, 18/2 10´L., Neoprene 22 AWG, 2-Wire Cable 3- or 4-Pin, Quick-Connect Receptacle

3-1/2˝(88.9 mm)

2˝ DIA.(50.8 mm)

CABLE10´ L.(3 m)

PERMANENTMAGNET

7/8˝(22.2 mm)

N.C.

N.O.

SLOSHSHIELD

SLOSHSHIELD

FLOAT

3/4˝ ACTUATION(19.0 mm)

1-7/16˝ REF.(36.5 mm)

1.38˝(35.1 mm)

BRASS STAINLESS STEEL

RETAININGRING

RETAININGCLIP

3-1/2˝ REF.(88.9 mm)

1.12˝(28.4 mm)

CABLE

SEALINGNUT

SEALINGNUT

LIQUIDTIGHTFITTING

LIQUIDTIGHTFITTING

1-1/16˝ HEX.

3/4˝ N.P.T.

5-5/16˝ (134.9 mm)

3-3/16˝ (81.0 mm)

1-1/2˝ (38.1 mm)

29/32˝ DIA..(23.0 mm)

4 PIN AMP RECEPTACLE

Specialty Switches – Continued

Portable Level Switch — Integral Mounting Magnet

LS-750 Series — Weighted for Suspension Cable

LS-700F Series

Precisely monitors liquid level and is ideal for controlling filling operations and preventing overflows. Permanent magnet attaches unit securely to steel tank wall at exact level required.

U.L. Recognized— File No. E-45168. CSA Listed-File No. LR-30200.

With a compact-sized float, slosh shield and weighted collar, the LS-750 provides liquid level detection for a wide variety of applications. Suspend in stand pipes or sumps for leak detection duty, or drop into wells for ground-water monitoring. Supplied with 25 feet of waterproof cable.

Overfill Protection for Refrigerant Tanks.The LS-700F enables safe compliance with EPA directives to recover refrigerants. These units are designed to fit standard 30# and 50# D.O.T. approved refrigerant tanks. They provide 80% full shutoff capability when used as an integral part of a recovery system.

U.L. Recognized— File No. SA8857. CSA Listed-File No. LR-30200-31.

Dimensions

How To Order — Select Part Number based on specifications required.

*See “Electrical Data” on Page X-5 for more information.– Stock Items.

SPECIALTY SWITCHES

L1 = Switch actuation level. In liquid with specific gravity of 1.0, switch actuation is approximately half the distance from end of stem to mounting, or at the halfway point of float travel.

** Stainless steel is generally recognized as safe (GRAS) with FDA for food contact regulations.


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Series BodyComponents

Number ofSensor Wires

WireLength O.D. Part Number

DLP-1*Buna-N float,

Stainless Steel and plastic housing

2 (N.O. in resting position) 16 ft.

1.22˝ DLP-1

DLP-2*1.88˝

DLP-2

DSP-2* DSP-2

DWP-25 Stainless Steel probesin plastic housing 2 25 ft. .625˝ DWP-25

DFP-25 Spring-loaded switch,plastic housing, wax pellet 2 25 ft. .625˝ DFP-25

SVP-2 Chemical-resistant plastic and Stainless Steel housing 2 16 ft. 2˝ SVP-2

Leak Detection Sensors Compact Size Low Cost Reliable Hydrocarbon Detection

Warrick® Leak Detection Sensors are designed for single wall piping, sump alarms and other small areas. Combine with Warrick Monitoring Panels for complete leak detection systems.

DLP-1 & DLP-2 DWP-25 DFP-25 SVP-2

Designed to detect presence of liquid in sumps, attached access pipes, annular spaces, or locations requiring a small float-operated sensor. Two models to fit 1-1/2˝ and 2˝ standard piping.

Designed for use in the annular space of double wall fiberglass tanks to detect the presence of conductive liquid. When combined with Warrick DMS or TA alarm panel, DWP-25 sensors can detect the presence of water or other conductive liquids in normally dry annular spaces.

Designed for use in the annular space of double wall fiberglass tanks to detect hydrocarbon liquids. When hydrocarbons are present, a hydrocarbon wax pellet dissolves and closes a springloaded switch to signal a leak. This sensor is not reuseable after exposure to hydrocarbons.

Designed to monitor hydrocarbon vapors in wells or sumps by absorbing the vapors and triggering a switch. Should not be used where vapors are continuously present. Fits in standard 2˝ pipe with cover.

Applications• AboveGround

Storage Tanks• Underground

Storage Tanks• Sumps• DryAnnular

Spaces

How to OrderOrder by Part Number (same as Series Name for these products).

* EPA Approved when used with Warrick TA or DMS panel. See pages E-30 and E-31 respectively.

DSP-2

Utilizesconductivityprobes and a reed switch based float switch to detect the presence of liquid and differentiate between hydrocarbons and water. When combined with Warrick DMS or TA two- channel alarm panel, the DSP-2 can discriminate between water and hydrocarbon liquids causing fault condition.


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Series Number Mounting Option Part Number

LS-10

With Double-Sided Tape 160330

No Tape 160340

No Tape – 25´ PVC Jacketed Cable 156000

CABLE

HOUSING

FLOAT .130˝ (3.3 mm) MAX. DIA. THRU

1.50˝ (38.1 mm)

3.02˝ (76.7 mm)

.40˝ (10.2 mm)

.236˝ (6.0 mm) REF.

.40˝ ACTUATION POINT (WATER)

17∞ MAX.

Double-Wall Pipe

LS-10

LS-10

Fiberglass,Double-Wall

Tank

ContainmentSump

Your Controls

BLACK

RED

2 CONDUCTORCABLE

N.C. DRY

NON-HAZARDOUS AREA

FUSE

FUSE

LOAD

SAFE-PAK

HOT VAC

NEUTRAL VAC

DCPOWERSUPPLY

ANNUNC.

(–)

(+)

3 2 1

BLACK

RED

2 CONDUCTORCABLE

N.C. DRY

HAZARDOUS AREA

NON-HAZARDOUS AREA

FUSE*

HAZARDOUS AREA

DCPOWERSUPPLY

ANNUNC.

(–)

(+)

3 2 1

BLACK

RED

2 CONDUCTORCABLE

N.C. DRY

HAZARDOUS AREA

NON-HAZARDOUS AREA

FUSE*

SENSERESISTOR3 2 1

SIGNAL RETURN BARRIER

SUPPLY BARRIER

BLACK

RED

2 CONDUCTORCABLE

N.C. DRY

NON-HAZARDOUS AREA

FUSE

FUSE

LOAD

SAFE-PAK

HOT VAC

NEUTRAL VAC

DCPOWERSUPPLY

ANNUNC.

(–)

(+)

3 2 1

BLACK

RED

2 CONDUCTORCABLE

N.C. DRY

HAZARDOUS AREA

NON-HAZARDOUS AREA

FUSE*

HAZARDOUS AREA

DCPOWERSUPPLY

ANNUNC.

(–)

(+)

3 2 1

BLACK

RED

2 CONDUCTORCABLE

N.C. DRY

HAZARDOUS AREA

NON-HAZARDOUS AREA

FUSE*

SENSERESISTOR3 2 1


SUPPLY BARRIER

BLACK

RED

2 CONDUCTORCABLE

N.C. DRY

NON-HAZARDOUS AREA

FUSE

FUSE

LOAD

SAFE-PAK

HOT VAC

NEUTRAL VAC

DCPOWERSUPPLY

ANNUNC.

(–)

(+)

3 2 1

BLACK

RED

2 CONDUCTORCABLE

N.C. DRY

HAZARDOUS AREA

NON-HAZARDOUS AREA

FUSE*

HAZARDOUS AREA

DCPOWERSUPPLY

ANNUNC.

(–)

(+)

3 2 1

BLACK

RED

2 CONDUCTORCABLE

N.C. DRY

HAZARDOUS AREA

NON-HAZARDOUS AREA

FUSE*

SENSERESISTOR3 2 1


SUPPLY BARRIER

LS-10 Series – Slim Profile for Interstitial Liquid SensingThe GEMS LS-10 liquid sensor accurately detects the presence of liquid in fiberglass double-wall tanks, containment sumps and double-wall pipes. Dry contact switching ensures dependability throughout its long service life. This reusable sensor easily fits small, interstitial spaces and senses liquid hydrocarbons or water. The unit is unaffected by hydrocarbon vapor, thereby reducing the risk of false alarms.

The LS-10 sensor’s rounded design makes it easy to remove, clean and reinstall after an alarm condition is triggered, or for maintenance.

Dimensions

Specifications

Wetted Materials:Housing: Valox®

Float: Foamed Polyethylene with Solid Polyethylene PinTape: UHB Double-Sided 3M Tape (p/n 160330 only)Cable: PVC

Pressure: AtmosphericOperating Temperature: -40°F to +176°F (-40°C to +80°C)Accuracy: ±1/8 inchSwitch Rating: 10W, 50-100 VDC Resistive Only, N.C. (opens on rising)Cable: Two (2) Conductor PVC Jacketed 24-26˝ ExtendedApprovals: UL Recognized

How to Order – Select Part Number based on mounting option

Note: The LS-10 sensor is a non-voltage producing device and does not contain energy storing components. However, since primary use is in hazardous locations, an appropriate intrinsically safe interface device is required for its use.

Typical Applications Fiberglass Double-Wall Tanks Containment Sumps Double Wall Pipes Piping Sumps

Typical Wiring DiagramsNon-Isolated System–Single Zener Barrier

Isolated System - Dual Zener Barrier

If two signal lines must be maintained above ground potential, an individual zener barrier is required per single line.

Single Safe-Pak® Relay

Safe-Pak® is an intrinsically safe, solid state relay

LEAK DETECTION SENSORS


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Tether Method Part Number

Tie Wrap 7762360

Weight 7762381

TIE WRAPTETHER POINT

PUMPING RANGE

PUMPING RANGE

TETHER POINT

WEIGHT

2-3/8˝(6.03 cm)

4-5/8˝(11.75 cm)

3-3/8˝(8.57 cm)

1/2˝ (1.27 cm)

XXXXXXM

SeriesM

Contact ConfigurationBLU – SPST, Normally Open, narrow angle1

YEL – SPST, Normally Closed, narrow angle1

RED – SPST, Normally Open, wide angle2

WHI – SPST, Normally Closed, wide angle2

GRE – SPDT, Form C, wide angle2

Length40 – 40 feet (12.19 m)

Tether MethodT – Tie W – Weight

Series M Mechanical Tilt Float Level Switch Non-Mercury Switch Sealed Cable Impact & Corrosion Resistant ABS Shell N.O., N.C., SPDT Contacts Various Cable Lengths Color Coded Body

Designed for level control and alarm applications in difficult liquids such as sewage and waste water. Series M mechanical tilt floats are ideal for applications where the presence of mercury is a concern. Series M Switches have impact resistant ABS shell and neoprene jacketed cable.

SpecificationsCord 2 or 3 conductor 16 AWG wire SJOW Oil Resistant CPEContact Rating 13 amp @ 120/240 VAC 1/2 hpContact Design SPST, Normally Open or Normally Closed Common with N.O. & N.C. (form C)Temperature Rating Dry 32°F to 194°F (0°C to 90°C) Water Resistant 32°F to 140°F (0°C to 60°C)Overall Weight 1.0 lbs. (not including weight)Tether Method Tie-wrap nylon, weight: 2.5 lbs.Approvals U.L. Recognized, CSA Cert.

Dimensions

Applications•LevelControl •Alarms •SewageLiftSystems •Slurries •DrainageSumps •WastewaterTreatment •HoldingTanks

How to OrderUse the Bold characters from the chart below to construct a product code.

Notes:1. Narrow angle pumping range approximately 2 in. to 8 in.2. Wide angle pumping range approximately 5 in. to 18 in.


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* SWITCH

INPUT POWER+ VDC

RED

WHITEBLACK

**

SWITCH

INPUTPOWER+ VDC

LOAD+ VDC

RED

WHITEBLACK

LOAD

* *

SWITCH

INPUT POWER+ VDC

LOAD+ VDC

RED

WHITEBLACK

Typical Wiring Diagrams - For all electro-optic units not otherwise specified.

* TTL/CMOS Output-For levels greater than 5 volts, a 10K pull-up resistor is required at the output. ** Maximum load=40mA @ 30VCD.

LightLost inLiquidLiquid immersing

the sensing prism.

Receiver

Prism

LED

LightfromLED

Liquid below thesensing prism.

Prism

ReceiverLED

Intermediate LiquidLevel Sensing

ELS-1100 Series;3/8˝ ConduitModel. Pipe LeakDetection

ELS-1100 SWITCH DOUBLE-WALLTANK

DOUBLE-WALLPIPE

YOUR CONTROLS

ELS-1100 SWITCH

Electro-Optic Level SwitchesSingle Point

Small size Economically priced Built-in, solid-state electronics No moving parts Simple, one-unit installationELS Series Level Switches are low cost, compact, optical level sensors with built-in switching electronics. With no moving parts, these small units are ideal for a variety of point level sensing applications — especially where dependability and economy are a must.

Level switches are suitable for high, low or intermediate level detection in practically any tank, large or small. Installation is simple and quick through the tank top, bottom or side. Solid state-switching ensures dependability over long service life.

The sensor offers ±1mm repeatability and broad liquid compatibility. They are not recommended for use in any liquid that crystallizes or leaves a solid residue.

General Operating PrincipleThe electro-optic sensor contains an infrared LED and a light receiver. Light from the LED is directed into a prism which forms the tip of the sensor.

With no liquid present, light from the LED is reflected within the prism to the receiver. When rising liquid immerses the prism, the light is refracted out into the liquid, leaving little or no light to reach the receiver. Sensing this change, the receiver actuates electronic switching within the unit to operate an external alarm or control circuit.

Reflective SurfaceAny optical sensor may be affected by reflective surfaces. Consult Gems if prism is to be less than 2 inches from any reflective surface.

Contents Page Start

Engineered Plastic ...............................................A-26

Alloy ............................................................................A-30

Opto-Pak ...................................................................A-31

Industry’s Largest Selection!

ELS-1100

ELS-950

ELS-1100HTS

ELS-1150Stainless Steel

ELS-1100FLGELS-1100TFE

Typical ApplicationsMedical laboratory • Food and beverage systems • Pharmaceuticals • Petrochemicals • Leak detection • Hydraulic reservoirs • Machine tools

ELECTRO-OPTIC TYPE


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File No. E108913

InputPower

ActuationCondition

Lead Wire Length

Mounting Type

1/4" MNPT 1/2"- 20UNF-2B M12x1-8

5 VDC±10%

Wet6 inches 224504 224501 224508

2 meters 226545 226541 226549

Dry6 inches 224505 224502 224509

2 meters 226546 226542 226550

12 VDC±10%

Wet6 inches 224506 224503 224510

2 meters 226547 226543 226551

Dry6 inches 224507 223625 224511

2 meters 226548 226544 226552

Note: Cable length available in 6˝ or 2 meters

New!New!

SENSORRED

BLACK

BLUE

+ +

—

—

V

LOAD

5 - 12VDC

RED

BLACK

BLUE

5 - 12VDC

SENSOR+ +

—

—

V

ELS-950 shown with over-molded electronics and o-ring sealing exposed. Actual units are not designed for disassembly.

ELS-950 Series Rugged Electro-Optic Level SensorThe ELS-950 Series represents Gems' smallest electro-optic level sensor developed to monitor a broad range of media including OHV type fluids.

Our UL approved design features a TPE over-molded electronics insert, TPE insulated wires, and fluorocarbon o-ring seals that create a watertight, environmentally resistant assembly, ideally suited for use in harsh environments.

The ELS-950 is excellent for industrial OEMs requiring a solid-state sensor for small space and high temperature environments.

Typical Applications• Coolantreservoirmonitoringandwarning• Medicaldiagnostic,sterilizer,washersanddialysisequipment• Lowlubricantwarningonmachinetools,generatorsets,

on- or off-highway vehicles • Lowlevelwarninginhydraulicreservoirs• Plasticoverflowbottles,plasticradiators• Leakdetectionfordrippans

SpecificationsMaterials Housing Polysulfone (Contact Gems for alternative material types) O-Ring 1/2”- 20UNF Mounting Fluorocarbon M12x1-8 Mounting Fluorocarbon Electronics Over-molded TPEOperating Pressure 0 to 250 PSI (0 to 17 bar) maximumOperating Temperature -40°F to +230°F (-40°C to 110°C)Current Consumptions (No Load) 5 VDC 4 mA 12 VDC 10mAOutput Sink40mAmax.,upto30VDCRepeatability ±1 mmApprovals CE, UL file No. 108913 IP66/67 Rating Pending ROHS Compliant

Wiring Diagrams

Relay Output

External Load

How To OrderSpecify Part Number based on Input and Output Condition required.

6"(119.8)

EXTENDED LENGTH

21/32"(16.3)

3/4"(19.1)

HOUSING,ELS-950

(3) TPE INSULATED LEAD WIRES, #22 AWG

'O'-RINGREF. 1/2"-20 UNF-2A

TH'D SHOWN

in(mm)

Dimensions

–StockItems.


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1/4˝ NPT Mounting 1/4˝ NPT Mountingwith 3/8˝ Conduit

1/2˝ Straight Thread Mounting with O-Ring

M12x1-8g Straight Thread with O-Ring

“Fish” Pull Ring

ElectricalTermination Lead Wires, 22 AWG, PVC Jacketed, 12˝ to 14˝ Extended 25´ Cable, 22 AWG,

PVC Jacketed

Input Power Probe Conditionat Current SInk

Mounting Type

1/4˝ NPT 1/4˝ NPT & 3/8˝ Conduit 1/2˝Straight Thread

M12x1-8gStraight Thread “Fish” Pull Ring

Polysulfone Polysulfone Nylon Polysulfone Polysulfone Polysulfone

5 VDC Wet 138167 144225 175631 144235 166541 —

10-28 VDCWet 142700 143585 157750 143580 169555 143577

Dry 143570 143590 175632 143575 169556 148973

5/8" HEX(15.9 mm)

2-5/32"(54.7 mm)

1/2" - 20 UNF 2A.47" REF.

2-5/32"(54.7 mm)

5/8" HEX(15.9 mm)

1/4" NPT

LEAD WIRES

2-5/32"(54.7 mm)

3/8" NPTMOUNTING

5/8" HEX(15.9 mm)

1/4" NPT

5/8" HEX(15.9 mm)

2-5/32"(54.7 mm)

M12 x 1-8g

VITON®

O-RING

.47" REF.

EPOXYENCAPSULATED

VITON®

O-RING 2-5/8" REF.(66.7 mm)

CABLE

REMOVABLE PVC FISH PULL RING

5/8" HEX.(15.9 mm)

ELECTRO-OPTIC TYPE

General Purpose ELS –1100 Series Satisfies Most ApplicationsThese polysulfone units are both compact and economical. They feature a variety of mountings, power requirements and electrical terminations to make it easy to find a perfect match for your application.

SpecificationsMaterials Housing and Prism Polysulfone or NylonOperating Pressure 0 to 150 PSI, MaximumOperating Temperature* 0°F to 176°F (-17.8°C +80°C)Current Consumption 18 mA, ApproximatelyOutput† TTL/CMOS Compatible. Open Collector Output May Sink 40 mA UP TO 30 VDC.Repeatability ±1 mmEMI Susceptability Meets (MIL-STD-461B Part 2 Modified) Specification of 10 V/M for Frequency Range 30 to 1000 MHz (Except 609 MHz = 9 V/M and 679 MHz = 7.5 V/M).* These switches are not for use in freezing liquid or steam/high condensation environments. Contact Gems for alternative solutions.

Dimensions

U.L. Listed File No. E108913

How To OrderSpecify Part Number based on Mounting Type, Input Power and Output Condition required.

– Stock Items.

Extended Power and Switching Capabilities of 12 VDC Models with Gems.

Converts TTL output signal to 5 Amp relay output. Available as open circuit board or mounted in a NEMA 4X enclosure (pictured). See Page A-31.

Intrinsically-Safe VersionsGEMS ELS-1100 Switches may be rendered intrinsically-safe for Class I, Division 1, Group C & D when used with appropriate GEMS Zener Barriers. Call Gems Sensors for special ELS-1100-IS (intrinsically-safe) part numbers and Installation Bulletins 148745 and 148744, File No. E44570.


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Probe Condition at Current Sink

Input Power Wet Dry

5 VDC 153061 153062

12 VDC* 153063 153064


Mounting Type Wet Dry

3/8˝ NPT 181674 181675

M16x2 191341 191342

12 VDC or 5 VDC+5

REDWHITE

BLACK

SWITCH

RED

BLACK

WHITEOUTPUT*

+ 5 VDC

*CAN DRIVE 10 TTL LOGIC GATE INPUTS

SWITCH

“Short”

HTS Version

2˝(50.8 mm)

3/8˝ NPT 3/4˝ HEX(19.0 mm)

EpoxyEncapsulated

#22 AWG, Polymeric,12˝ to 14˝Extended

Lead Wires

1.38˝Ref

.55˝Ref

M16 x 2Viton® O-Ring

Lead Wires#22 AWG, Polymeric,12˝ to 14˝Extended

3/4˝HEX

1.38˝Ref

.55˝Ref

3/8˝NPT

3/4˝ HEX

EpoxyEncapsulated

Lead Wires#22 AWG, Polymeric,12˝ to 14˝Extended

ELS –1100HT Handles Temperatures to 212°FSlightly larger than the ELS-1100, the “HT” or High Temperature version is made from high performance Isoplast® plastic. While maintaining broad chemical compatibility, these units also handle fluid temperatures to 212°F. They feature 3/8˝ NPT mountings and the shortest of any of our plastic electro-optic switch bodies – HTS versions are a mere 1/2˝ long!

Typical Applications• Coolant reservoir monitoring

• Medical diagnostic and sterilizer equipment

• Low lubricant warning on machine tools

• Low level warning in hydraulic reservoirs

SpecificationsMaterials Housing and Prism Isoplast®

Operating Pressure 0 to 150 PSI, MaximumOperating Temperature* -40°F to +212°F (-40°C +100°C)Current Consumption 45 mA, ApproximatelyOutput TTL/CMOS Compatible. Transistor Output with 10K Pull Up Resistor May Sink 18 mA. 12 VDC input power units switch a maximum 5 VDC on output Repeatability ±1 mm* These switches are not for use in freezing liquids or steam/high condensation environments. Contact Gems for alternative solutions.

Wiring DiagramsTTL Compatible OutputTransistor Output

How To OrderHT SeriesSpecify Part Number based on Input and Output Condition required.

*12 VDC input power units switch a maximum 5 VDC on output.Note: Extend the power and switching capabilities of 10-28 VDC

models with Gems Opto-Pak Controllers.

– Stock Items.

HTS Series - 5 VDC Input OnlySpecify Part Number based on Wet or Dry switch actuation and mounting type.

File No. E108913

File No. E108913

Dimensions

ELS-1100HTS

ELS-1100HT

HT Series

HTS Series3/8˝ NPT Mounting

M16 x 2 Straight ThreadMounting with O-Ring


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Probe Conditionat Current Sink

Part Number

With Cable Boot No Cable Boot

Wet 187595 173800

Dry 185600 173700


Input Power Wet Dry

5 VDC 187575 187590

10-28 VDC 187585 187580

2-1/2˝ REF.

.50˝REF.

Cable,TFE Jacket

5/8˝HEX. REF.

1/4˝NPT REF.

Optional Hypalon® Boot,Cable Seal

3/8˝ NPTConduit Connection

2.16˝REF.

0.75˝DIA.

1/4˝ Max. WallThickness

1/8˝ Thick Viton® Gasket

Lead Wires

ELECTRO-OPTIC TYPE

ELS-1100TFE Teflon® For Ultra-Pure or Aggressive FluidsWhen high purity or resistance to chemical attack is vital, ELS-1100TFE sensors are the ultimate solution. They feature a pure Teflon® body and prism construction. Even the Hypalon® vapor barrier and Teflon® coated lead wires give evidence to the care we’ve taken to make this the perfect liquid level sensor for pharmaceuticals, semiconductor manufacturing, food and beverage, chemical processing, or anywhere purity or chemical resistance is the major criteria.

SpecificationsMaterials Housing and Prism Teflon®

Operating Pressure 0 to 150 PSI, MaximumOperating Temperature* 0°F to 176°F (-17.8°C +80°C)Input Voltage 10 - 28 VDCCurrent Consumption 18 mA, ApproximatelyOutput† TTL/CMOS Compatible. Open Collector Output May Sink 40 mA Up to 30 VDC.Repeatability ±1 mmEMI Susceptability Meets (MIL-STD-461B Part 2 Modified) Specification of 10 V/M for Frequency Range 30 to 1000 MHz (Except 609 MHz = 9 V/M and 679 MHz = 7.5 V/M).* These switches are not for use in freezing liquid or steam/high condensation environments. Contact Gems for alternative solutions. † See Page A-25 for Wiring Diagrams

Dimensions

How To OrderSpecify Part Number based on Output Condition and Boot Option.

ELS-1100FLG Flange Mounting for Installations Without Threaded HolesThe easy solution for thin wall tanks (≤1/4˝ thick): ELS-1100FLG Series. No threads needed with these flanged units. Slip through a .75˝ hole and tighten the jam nut; Viton® gasket forms a tight seal. Ideal for sheet metal, molded plastic tanks and medical applications where elimination of exposed threads removes potential bacterial breeding grounds.

SpecificationsMaterials Housing and Prism PolysulfoneOperating Pressure 0 to 150 PSI, MaximumOperating Temperature* 0°F to 176°F (-17.8°C +80°C)Input Voltage 10 - 28 VDCCurrent Consumption 18 mA, ApproximatelyOutput† TTL/CMOS Compatible. Open Collector Output May Sink 40 mA Up to 30 VDC.Repeatability ±1 mmEMI Susceptability Meets (MIL-STD-461B Part 2 Modified) Specification of 10 V/M for Frequency Range 30 to 1000 MHz (Except 609 MHz = 9 V/M and 679 MHz = 7.5 V/M).* These switches are not for use in freezing liquid or steam/high condensation environments. Contact Gems for alternative solutions. † See Page A-25 for Wiring Diagrams

Dimensions

How To OrderSpecify Part Number based on Input Power and Output Condition Required.


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InputPower

Probe Conditionat Current Sink

Nickel-Plated Steel Housing Stainless Steel Housing

1/2˝ NPTMounting

3/4˝ – 16 Straight Thread

1/2˝ NPTMounting

5 VDCWet 194469 195201 205486

Dry 194470 195202 205487

12 VDCWet 194471 195203 205490

Dry 194472 195204 205495

+12 VDC or +5 VDC

R

LEDOUTPUT

18 mAMAX.

REDWHITE

BLACK

RED

BLACK

WHITE

+12 VDCor +5 VDC

LOAD18 mAMAX.

1/2˝ NPT

1.38˝(35 mm)

EpoxyEncapsulated

Lead Wires

3/4˝-16UNJF 3A

O-RING

7/8˝ HEX(22 mm)

7/8˝ HEX(22 mm)

UP TO45˚

ELS-1150SS

ELS-1150

The Enhanced ELS-1150 Compact Electro Optic Level Switch available in Nickel-Plated Carbon Steel or Stainless Steel

The enhanced ELS-1150 series is the highest performing electro optic level switch from Gems Sensors. At just 1.38” long, the ELS-1150 has been upgraded with a micro processor board design to provide a wide range of capabilities including sinking and sourcing and time delay outputs. The strong fused glass prism eliminates leak potential and is capable of handling extreme temperature and pressure applications up to 2500 psi. The ELS-1150 series is available in FM and EP versions with wide voltage ranges (ELS-1150XP). Built with solid state reliability, the sensor is available at an affordable price in Nickel-Plated Carbon Steel or Stainless Steel. The compact size of the sensor makes them ideal candidates for monitoring the small, pressurized vessels found in HVAC, refrigeration and hydraulic applications. The sensors are most commonly used for low, high and intermediate level detection.

The stainless steel version (ELS-1150SS) is excellent for application requiring corrosion resistance and is ideal for acids, solvents and dielectric water applications.* Higher temperature versions available up to 125ºC. Contact our factory experts for additional ordering information.

SpecificationsMounting 1/2˝ NPT, 3/4˝-16 Straight ThreadMaterials Housing Nickel-Plated Carbon Steel or Stainless Steel Prism Fused GlassOperating Pressure 0 to 2500 PSI, MaximumOperating Temperature* -40°F to +212°F (-40°C to +100°C)Current Consumption ~45 mAOutput Open Collector Output, 18 mA Sink, Max.Electrical Termination 22 AWG, Polymeric, 12˝ to 14˝ Extended Lead WiresRepeatability ±1 mmApprovals** CE, UL File No. E108913, CUL * These switches are not for use in freezing liquid or steam/high condensation environments. For higher temperature versions up to 257°F (125°C), and for other alternate requirements, contact Gems factory. ** Carbon Steel model only.

Wiring Diagrams - Typical

Note: Inductive loads must be diode suppressed.

How To OrderSpecify Part Number based on Input Power/ Output Condition and material required.

File No. E108913

Dimensions

1/2˝ NPT Mounting 3/4˝ - 16 Straight Thread Mounting

Mounting AttitudeThese units must be mounted horizontally or up to 45° from horizontal only.

Applications•Hydraulicandlubricatingoilreservoirs•Criticalfluidlevelmonitoringon

machine tools, compressors, chillers and other industrial OEM equipment

•Idealunitcapableofhandlingcorrosiveliquids such as: acids, solvents, and dielectric water applications•MedicalEquipment;Anesthesia,Histology


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Description Part Number

Open Board 149536

NEMA 4X Enclosure 149535

115 VAC

ALARM

AC

N.C.CN.O.

115 VAC

REL

AY O

UTP

UT

O(+)(-)

+

PRO

BE

-

115 VAC

ALARM

AC

N.C.CN.O.

115 VAC

REL

AY O

UTP

UT

O(+)(-)

+

PRO

BE

-

RED LED(RELAY)

GREEN LED(POWER)

WHITE (OUTPUT)RED (+V)

BLACK (GND)

TANK

+

ELS-1100SWITCH

ASSEMBLED UNIT

2-31/32" (75.4 mm)

4-15/16" (125.4 mm)

4" LONG,APPROX.

Electro-OpticController

POWER OUTPUT

INPUT VOLTAGE 120VAC50/60 Hz

P/N 149535

+

+

+

+

+

GEMSOPTO-PAK™

2-1/2" (63.5 mm)

3-13/16" (96.8 mm)

+ +

+Opto-Pak® Controllers for GEMS Electro-Optic SwitchesExtend power and switching capabilities of 12 VDC Electro-Optic switches

Converts TTL output signal to an SPDT 5 Amp relay output. Operates with 12 VDC ELS-1100, ELS-1100HT*, ELS-1150,

ELS-1200* and ELS-300 Series Electro-Optic Switches. Available as open board or mounted in NEMA 4X junction box.

GEMS Opto-Pak Controllers convert standard 110 VAC line current to the 12 input power required for ELS-1100 and ELS-300 operation, and provide an SPDT, 5 Amp relay output for direct control of moderate loads. Two models are available: an open circuit board Opto-Pak Controller for incorporation into custom enclosures, and the self-contained, NEMA 4X model pictured here.

*12 VDC versions only.

SpecificationsVoltage Input 115 VAC ±10%, 50/60 HzMaximum Current Draw 70 mA @ 120 VACRelay Output SPDT; 5 Amps @ 115 VAC, 5 Amps @ 30 VDCOperating Temperatures -13°F to + 158°F (-25°C to + 70°C)Electrical Connections 1/4˝ Male Spade Terminals**Ten (10) 1/4˝ female spade connectors (not shown) shipped loose with each unit.

DimensionsOpen Circuit Board Type NEMA 4X Type

Typical WiringNormally Open Normally Closed

How To OrderSpecify Opto-Pak™ Controllers by Part Number.

– Stock Items

Green and Red LEDs indicate power and output status.

Typical ApplicationsWorks with 12V units: • ELS-1100 • ELS-1100HT • ELS-1200 • ELS-300 • ELS-1100FLG • ELS-1150 • ELS-950

OPTO-PAK® CONTROLLERS


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ExOsense™ Piezo-Resonant Sensors Non-Intrusive Repeatable Easy to Install – Easy to Use

ExOsense™ is the first affordable, non-intrusive liquid level sensor for plastic fluid containers. ExOsense™ sensors adhere to the outside of tanks, bottles and vessels, and are unaffected by the color or transparency of the plastic. Liquids inside the bottle are untouched, so with ExOsense™ there is no issue of material compatibility or contamination. Best of all, ExOsense™ sensors fit any size and shape vessel, from small containers to large tanks.

SpecificationsCompatible Plastic Bottle Materials Polyethylene (PE), Polypropylene (PP) Polycarbonate (PC), ABS, Styrene, PVC, and othersBottle Materials Not Recommended Teflon® family, or Any Foamed Core PlasticsMin. Bottle Diameter for Round Bottles 3˝ (76.2 mm)Bottle Wall Thickness 0.04˝ to 0.15˝ (1.0 mm to 3.8 mm)Termination of Sensor Mini USB Style Connector to ElectronicsInput Power Supply (volts) 4.75 to 5.25 VDC (Optional Voltage Regulator available for 6 to 32 VDC.)Power Consumption (current) <40mA Typ. @ 5 VDCCalibration No User Calibration Required. Pre-configured for Container Materials, Wall Thickness, & Output Options. Works on Bottle Materials or Wall Thickness Without User Input.Output Configuration Open Collector; 40 mA, Max.Switch Condition Normally Open/Normally ClosedStandard Response Time 2 msec.Delay Range 0 to 60 Seconds, Standard is No Delay, Optimal is 0 to 60 Seconds.RFI/EMI Susceptibility 3v/mAgency Approvals UL 508 Listed (File E 305671), CE & IEC 61326 (RFI/EMI)Operating Temperature Sensor 32°F to158°F (0°C to 70°C) Electronics 32°F to149°F (0°C to 65°C)Repeatability ±0.039˝ (±1 mm)Accuracy ±0.063˝ (±1.6 mm)Sealing Capability IP65 Operating PrincipleOur sensor incorporates proprietary transducer technology employing piezoelectric material. When piezoelectric material is excited, it creates an acoustic signal as a function of the natural resonance of the material. ExOsense™ sensors generate this acoustic signal, direct it through the bottle wall and sense the reflected pulse.

The amount of energy that is reflected is determined by the “acoustic impedance* mismatch” of the materials in use. For example, if sound passes through two materials with similar acoustic impedances (figure 1), very little energy will be reflected. If sound passes through two materials with dissimilar impedance values (figure 2), the majority of the acoustic energy will be reflected. This acoustic impedance mismatch provides the basis for the detection of liquid level.

* Acoustic Impedance: a material property defined as the product of sound velocity and material density. The rela-tive transmission and reflection at an interface are governed in part by the acoustic impedances of the materials on each side of the interface. The letter Z is used for acoustic impedance and is expressed in [kg/s m2] = 1 Rayl: Water Z = 1.5 MRayls; Air Z = 0 MRayls

VesselWall

Fig. 1

Fig. 2

ZPLASTIC = 1.8 ZAIR = 0

ZPLASTIC = 1.8

Z = Acoustic Impedance

ZWATER = 1.5

Typical ApplicationsFluid Monitoring: •Inkhandlingsystems •Waterpurificationsystems •Pesticidemanagementandusage •Watertreatmentsystems •Fluidstoragetanks •Coolant •Saline •Nuclearliquidwastes •Containmentsystems •Oilwaterseparationsystems •Semiconductorfabrication •Waste •Chemicals •Detergent/wash

U.S. Patent 7,360,417


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Part Numbers

Container Material

Container Thickness

.04" to .062" (1.02 to 1.57 mm) .058" to .082" (1.47 to 2.08 mm) .08" to .102" (2.03 to 2.59 mm) .1" to .125" (2.54 to 3.18 mm)

N.O Wet Sink N.C Dry Sink N.O Wet Sink N.C Dry Sink N.O Wet Sink N.C Dry Sink N.O Wet Sink N.C Dry Sink

HDPE 219005 219013 219005 219013 219005 219013 219005 219013

LDPE 219002 219010 219002 219010 219008 219016 219008 219016

Polypropylene 219001 219009 219004 219012 219004 219012 219004 219012

Polycarbonate 219006 219014 — — — — 219004 219012

Polystyrene 219005 219013 219005 219013 219005 219013 219005 219013

Polysulfone 219007 219015 NR NR NR NR NR NR

PVC 219003 219011 219003 219011 219003 219011 219003 219011

Polyester — — 219002 219010 — — 219006 219014

ABS 219001 219009 219001 219009 219001 219009 219001 219009

Note: All p/n above includes ExOsense sensor plus standard 5 VDC electronic control module, no delay 24" cable. Consult factory for combinations not listed above.

1.25˝ (32 mm)Dia.

SensorAssembly

ConnectorSeal

ConnectorOutsideSensor

6.25 ±0.25˝ (158.8 ±6.4 mm)Cable Length BetweenSensor and Electronics

Cable Length Extended24˝ (0.6 m) Extended Standard78˝ (2 m) Extended Optional

0.760˝(19 mm)

0.575˝(14.6 mm)

1.40˝ (35.43 mm) REF.

1.72˝ (43.7 mm) REF.0.59˝

(15 mm)REF.

2˝ (50.8 mm) REF.

2˝ (50.8 mm)REF.

1.80˝ (46 mm)

0.860˝ (22 mm)

0.282˝ (7.16 mm) REF

Sensor Assembly

Connector Inserted Into Sensor

Fully Over-Molded ECM

ECM

Mini Connector

1.5˝ (38.1 mm)

Features•Non-Intrusive,staysoutsidethecontainer •Simpleinstallation •Nocalibrationneeded •Nolong-termdrift •±1.6mmAccuracy •Verysmallfootprint •Robustdesignforroughhandling •Mini,moisture-resistantconnectorfor ease of use •Fullyscaled,overmoldedECM

Benefits•Nevercontactshazardousfluids •Eliminatesfluidcontamination •Repeatableliquidlevelsensing •Easytouse •Eliminatesfluidcompatibilityissues •Improvesinstrumentuptime •Maximizestankvolume •Improvessystemsreliability •Nospecialmountingrequired •Eliminatestestingformediacompatibility

Connection Type Part Number

Header 219445

Solder 218699

Optional Voltage Regulator 8-30V Input / 5V Output

Super Simple Installation1. Peel & Stick Peeltheadhesivecoveroffthesensorandstickitonthebottlewhereyouwanttoindicatethelevel.

2. Connect ConnectthesensortotheECMusingtheminiconnector.

3. Sense Applypowerandsensethefluidlevel.

Dimensions

How To OrderUsethematrixbelowtoselectaPartNumberbasedonContainerMaterial,ContainerThicknessandSensorCondition@CurrentSink.

PIEZO-RESONANT TYPES


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ULS-1 ULS-10 ULS-100 ULS-11

Single Point Sensing • • • •Input Power:115 VAC / 230 VAC • •12/24 VDC • •9-36 VDC •12-36 VDC •

Output:10 Amp DPDT • •1 Amp SPDT • •5 mA (dry), 10 mA (wet) •4 mA / 20 mA Single 2-Wire •FM-Approved Explosion Proof Option •

Sensor Material Options:316 Stainless Steel (standard) • • •316L Stainless Steel •Monel® •Hastelloy B® •Hastelloy C® •Teflon® • •Kynar® •CPVC •Polypropylene •

Ultrasonic Switches Monitor the Toughest Applications Operates in a wide variety of liquids Handles pressures to 1000 psi Unaffected by foam, vapors, particulate or turbulence Lengths to 121 inches (307.3 cm) Can be side, top or bottom mounted Sized and priced for most applications Easy to install — simple to use

GEMS ULS Series of ultrasonic switches are designed for a broad spectrum of viscous to light liquids; including some of the most challenging liquids you may deal with: acids, freon, paints, lacquers, etc. Stainless steel units are built to withstand high temperatures and pressures with welded stainless steel sensor probes that have no seals to leak and no moving parts to wear out. ULS Series switches are unaffected by variation in temperature, pressure, density or type of liquid. ULS-10 and ULS-100 electronics are housed in cast aluminum, NEMA 4/NEMA 7 explosion proof and water tight enclosures.

Ultrasonic SwitchSelection Guide

ULS-100

ULS-11

ULS-1

ULS-10


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TRANSMITTINGCRYSTAL

RECEIVINGCRYSTAL

PUMP CONTROL

LOW LEVEL ALARM

HIGH LEVEL ALARM

COMPUTER INTERFACEOR

REMOTE CURRENTDETECTOR CIRCUIT

CARRIERPIPE SECONDARY

CONTAINMENTPIPE

SECONDARY CONTAINMENT3/4" NPT FITTING

(1/2" NPT OPTIONAL)

SECONDARY CONTAINMENT TANK

3/4" NPTFITTING

General Operating PrincipleULS Series switches operate using ultrasonic sound wave propagation. Ultrasonic sound waves are greatly attenuated when transmitted through air. Conversely, when liquid is present, transmission of the sound waves is greatly enhanced. The electronic control unit generates electrical signals that are converted to bursts of ultrasonic energy at the sensor. The ultrasonic bursts are transmitted across the liquid sensing gap. Upon receipt of a valid signal, the solid-state electronics generate a data enable condition, indicating liquid is present. This signal energizes a relay and provides an output condition.

ULTRASONIC TYPE

Typical Installation1. Drill a suitable hole in the vessel or pipe wall

and tap for 3/4˝ NPT. In thin walled vessel or material not suitable for threading, weld or braze a bushing to accept the sensor.

2. Screw the sensor in the threaded section and make sure that there is a good seal. Use a pipe compound or sealing tape to avoid excessive tightening. Do not overtighten.

3. Run the power and control wiring cables to the electronics control unit.

Contents Page Start

ULS-1 Low Power Steel ......................................A-34

ULS-10 & ULS-100 10 Amp Switches ...........A-35

ULS-11 Low Power Steel....................................A-37

Vertical or Horizontal Mounting

Advantages of GEMS ULS-10 2-Wire Output Switches1. No A.C. Power 2. No Coaxial Cable Required 3. Up to 1000 ft. or Longer Distance 4. Reduces Installation Cost

Secondary Containment Tanks and Piping Systems

MaintenanceElectronics are constructed with solid-state components and epoxy-potted. Periodically, check and clean the sensor when used with liquids which cause a coating build-up on the sensor. No other maintenance is required.

If the pipe or vessel to which the unit is mounted is to be steam-cleaned or cleaned with abrasive detergents, remove the entire unit before cleaning by:

(1) Disconnecting the power at source.

(2) Opening the housing cover.(3) Removing power and control wiring cables.(4) Unthreading the sensor.To reinstall, follow installation procedures.

Switch actuates when level reaches halfway point of gap.


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1˝(25.4)

5/8˝(15.9)

5/8˝(15.88)

2 1/4˝(57.15)

SWITCH POINT

1/2˝ NPT

24 AWG PVC JACKET,12˝ (305 MM) LENGTH

POWER(+) RED, 5VDC TO 30VDC

(-) BLK, GROUND

GREEN, CHASSIS GND

WHITE

BROWN

OUTPUT

1˝(25.4)

5/8˝(15.88)

1.76˝(44.7)

3/8˝(9.5)

SWITCH POINT

1/4˝ NPT

1˝(25.4)

5/8˝(15.9)

5/8˝(15.88)

2 1/4˝(57.15)

SWITCH POINT

1/2˝ NPT

24 AWG PVC JACKET,12˝ (305 MM) LENGTH

POWER(+) RED, 5VDC TO 30VDC

(-) BLK, GROUND

GREEN, CHASSIS GND

WHITE

BROWN

OUTPUT

1˝(25.4)

5/8˝(15.88)

1.76˝(44.7)

3/8˝(9.5)

SWITCH POINT

1/4˝ NPT

Dimensions1/4˝ NPT Mounting

Wiring

1/2˝ NPT Mounting

LOW LEVEL

HIGH LEVEL

ULS-1 Single Point Level Switches Compact 1/4˝ and 1/2˝ NPT versions All-Stainless Steel wetted materials IP68 construction for tanks or sumpsGems ultrasonic switches are an excellent choice for a broad range of liquids including those with light coating or scaling type characteristics.

Relay output provides a reliable switch interface with remote devices such as a PLC, SCADA or alarm.

SpecificationsWetted Material 316L Stainless SteelRepeatability 2 mm (or better)Protection Transient Reverse PolarityLeakage Current <50µADelay 0.5 secondsInput Power 5 VDC to 30 VDCOutput See Ordering Table

Mounting Size Electronic Output Part Number

1/4˝ NPT

Wet Sink 220901

Wet Source 220902

1A SPST Relay, Normally Closed 220903

1/2˝ NPT

Wet Sink 221485

Wet Source 221486

1A SPST Relay, Normally Closed 221487

Note: Other Electronic Output options are available. Please contact Gems.

How To OrderSelect a Part Number based on Mounting Size and Output.

Wiring Direct to a LoadN.C. Operation (Relay Signal Output)

LOAD

12 - 36 VDCPOWER SUPPLY(SENSOR)

60 VAC/ VDCMAXIMUMPOWER SUPPLY

CONTROLLED DEVICE(RELAY, LAMP, VALVE, ETC.)1A MAXIMUM

BLACK

RED

BROWN

GREEN

WHITE

SHIELDGROUND


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FM

ULTRASONIC TYPE

ULS-10 Series and ULS-100 Series

High Performance Models with Explosion-Proof Housings 10 Amp Relay Output 115/230 VAC 12 VDC or 24 VDC Input High Gain No Calibration Necessary Temperatures to 300°F (149°C) Lengths to 99 inches (251.5 cm)

The ULS-100 Series features our high performance sensor probe for handling liquid temperature to 300°F (149°C) and pressure to 1000 psi. Explosion-proof and water-tight, cast aluminum enclosures are standard; FM Approved explosion-proof enclosures are also available.

The ULS-10 Series features a Tip Gap probe design for closer tank bottom access. The miniaturized, encapsulated electronic control unit may be supplied for remote mounting, or directly mounted on sensor in an explosion-proof, NEMA enclosure. FM-Approved, explosion-proof enclosures are also available.

SpecificationsInput Power 115/230 VAC, 50/60 Hz; or 12/24 VDCGain ULS-10 Series 500:1 ULS-100 Series 1000:1Output ULS-10 Series 10 Amp DPDT Relay, or 2-Wire, 4mA-Dry, 20mA-Wet (9-36 VDC) ULS-100 Series 10 Amp DPDT RelayDelay (On) 0.5 SecondsRepeatability 2mm, TypicalHousing NEMA 4/NEMA 7 Watertight, Explosion Proof Enclosure, Epoxy Coated Cast Aluminum Class I, Group C & D; Class II, Group E, F, & G; and Class III, Division 1 & 2.Operating Temperature Sensor ULS-10 Series -40°F to +300°F (-40°C to +149°C) ULS-100 Series -40°F to +300°F (-40°C to +149°C) Electronics -20°F to +170°F (-29°C to 77°C)Pressure, PSIG, Max. 1000 @ 250°F

ULS-100 SeriesFM-Approved Explosion-Proof Enclosure may be ordered by specifying ULS-100-EP.

ULS-10 SeriesWill sense liquid to within 1/4˝ of tank bottom.

Remote ElectronicsConfigurations

ULS-10 Sensor Probe

ULS-100Sensor Probe

RemoteElectronics

Ordering is Easy! See Page A-38.Easy online ordering too!


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Integral Electronics 3/4˝ NPT Remote Electronics 3/4˝ NPT

ULS-100 Series ULS-10 Series ULS-100 Series ULS-10 Series

Mounting and Sensor Materials

316 Stainless Steel (Standard) Consult Factory For Other Materials.

1-1/2"(38.1 mm)

1/2" (12.7 mm) Gap

L1

7/8"(22.2 mm)

4.0"(101.6 mm)

3-3/4" (95.2 mm)

2-1/2" (63.5 mm)

MIN.

2-1/2" (63.5 mm)

MIN.

3/4" NPT

7/8"(22.2 mm)

3/4" NPTTHREADEDHUB

1-1/2" (38.1 mm)

1-1/2" (38.1 mm)

NO O NC L1 L2 G

3-3/4" (95.3 mm)

7/8" (22.2 mm)

2-1/2" (63.5 mm)

MIN.

4-1/2" (114.3 mm)

3/4" NPT

4.0"(101.6 mm)

3-3/4" (95.2 mm)

3/4" NPT

7/8" (22.2 mm)

2-1/2" (63.5 mm)

MIN.

3/4" NPTTHREADEDHUB

1/4" (6.4 mm)5/16" (7.9 mm) Gap

L1

1-1/2"(38.1 mm)

1/2" (12.7 mm) Gap

L1

7/8"(22.2 mm)

4.0"(101.6 mm)

3-3/4" (95.2 mm)

2-1/2" (63.5 mm)

MIN.

2-1/2" (63.5 mm)

MIN.

3/4" NPT

7/8"(22.2 mm)

3/4" NPTTHREADEDHUB

1-1/2" (38.1 mm)

1-1/2" (38.1 mm)

NO O NC L1 L2 G

3-3/4" (95.3 mm)

7/8" (22.2 mm)

2-1/2" (63.5 mm)

MIN.

4-1/2" (114.3 mm)

3/4" NPT

4.0"(101.6 mm)

3-3/4" (95.2 mm)

3/4" NPT

7/8" (22.2 mm)

2-1/2" (63.5 mm)

MIN.

3/4" NPTTHREADEDHUB

1/4" (6.4 mm)5/16" (7.9 mm) Gap

L1

9 VDC TO36 VDC

- +

COAXIALCABLE TOSENSOR

J1J2

4-20 MA

L2NONO C L1 GNCNCC

POWER

COAXIALCABLE TOSENSOR

J1J2

115V AC50/60 HZ

DPDT

JUMPERHIGH LEVELFAIL SAFE

JUMPERNORMALPOSITION

1-1/2"(38.1 mm)

1/2" (12.7 mm) Gap

L1

7/8"(22.2 mm)

4.0"(101.6 mm)

3-3/4" (95.2 mm)

2-1/2" (63.5 mm)

MIN.

2-1/2" (63.5 mm)

MIN.

3/4" NPT

7/8"(22.2 mm)

3/4" NPTTHREADEDHUB

1-1/2" (38.1 mm)

1-1/2" (38.1 mm)

NO O NC L1 L2 G

3-3/4" (95.3 mm)

7/8" (22.2 mm)

2-1/2" (63.5 mm)

MIN.

4-1/2" (114.3 mm)

3/4" NPT

4.0"(101.6 mm)

3-3/4" (95.2 mm)

3/4" NPT

7/8" (22.2 mm)

2-1/2" (63.5 mm)

MIN.

3/4" NPTTHREADEDHUB

1/4" (6.4 mm)5/16" (7.9 mm) Gap

L1

2. Actuation Level Dimensions

ULS-10 SeriesSwitch actuation level (L1) is determined following the guidelines below.L1 = 2-1/4˝ (57.2 mm) Minimum 99˝ (251.5 cm) Maximum*

Wiring Diagrams

Note:For 24 VDC or 12 VDC ModelsConnect Positive (+) to L1-TerminalConnect GND (-) to G - Terminal

DPDT – ULS-10 and ULS-100 Series 4-20mA – ULS-10 Series only

*Consult factory for longer lengths.

ULS-100 SeriesSwitch actuation level (L1) is determined following the guidelines below.L1 = 1˝ (25.4 mm) Minimum 99˝ (251.5 cm) Maximum*

1. Mounting Type*

*Flanges also available; consult factory for sizes and materials.


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ULTRASONIC TYPE

Type 13/4˝ NPT

Mounting andSensor Materials 316 Stainless Steel

Description Part Number

2.25˝ L1, SPST N.O. 175387

2-1/2˝†(57.2 mm)

MIN.

7/8˝(22.2 mm)

L1

3/4˝ NPT

1/4˝ (6.4 mm)

4-1/2˝ (114.3 mm)

MIN.

2-1/2˝†(57.2 mm)

MIN.

7/8˝(22.2 mm)

L1

3/4˝ NPT

1/4˝ (6.4 mm)

4-1/2˝ (114.3 mm)

MIN.

ULS-11 Series – Single PointSelf-Contained Relay Saves Space

1 Amp SPDT Relay Output 9 to 36 VDC Input Temperatures to 160°F (71.1°C) Lengths to 99 inches (251.5 cm)

By integrating a 1 amp relay into the stem, we’ve made the ULS-11 our most compact ultrasonic unit. Yet, as unobtrusive as it is, the ULS-11 still delivers ultra-reliable solid-state performance in lengths up to 99 inches. Tip gap probe configuration places sensing point at 1/4 inch from probe tip for closer tank bottom sensing. Electronics are completely epoxy sealed for years of maintenance free service.

SpecificationsInput Power* 9 VDC to 36 VDCLeakage Current <50 µAGain 300:1Output 1 Amp, SPST Relay output N.O. or N.C.Consumption Relay 40mA energized; 10mA relay offRepeatability 2mm typicalDelay (On) 0.5 SecondsOperating Temperature -20°F to +160°F (-29°C to +71°C)Pressure, PSIG, Max. 1000Protection Transient Reverse PolarityLead length 12˝ PVC** * Contact GEMS for optional AC input versions. ** Consult factory for longer lead lengths.

1. Mounting Type

† 2-1/4˝ units are standard stock units. All other lengths are custom and require 5-piece minimum order. Contact factory.

How To OrderSpecify ULS-11 Level Sensors by Part Number.

– Stock Items

Wiring DiagramREDBLACKBLUE OR

BROWN

WHITE

Color CodePower: Red (+) Black (-)Relay: Common - White N.O. - Blue N.C. - Brown

Integrated solid-state electronics make the ULS-11 one of the most compact ultrasonic level switches available.

2. Actuation Level Dimensions

Switch actuation level (L1) is determined following the guidelines below.L1 = 2-1/4˝ (57.2 mm) Minimum 99˝ (251.5 cm) Maximum

Ordering is Easy! See Page A-40.Easy online ordering too!

A-40

Product Check List

Photocopy This FormUse one form for each product

type you are selecting.

This is a Request for a Quote Order P.O.# ______

Quantity Needed ____________

Date Required ____/____/_____

Shipping Method: ____________

Partials Accepted: Yes No

Name __________________________________________

Company ________________________________________

Street __________________________________________

City _______________________ State ____ Zip__________

Phone ( _____ ) __________________________________

Fax ( _____ ) _____________________________________

Visit www.GemsSensors.com for most current information.

Gems Sensors & ControlsOne Cowles RoadPlainville, CT06062-1198tel 860.747.3000fax 860.747.4244www.gemssensors.com

Sensors & Controls

Ultrasonic Level SwitchesApplication Environmental ConditionsThis information is essential to the accurate and proper operation of your GEMS configurable sensors. Please complete fully and accurately.

1. Liquid Media: _________________________________________

2. Pressure: Minimum __________ psig Maximum ________ psig

3. Temperature: Minimum ________ °F Maximum __________°F

4. Specific Gravity: Minimum ________ Maximum ___________

5. Viscosity: _________________ SSU

6. Tank Material: ________________________________________

Tank Depth: __________________________________________

7. Unit is Mounted In: Tank Top Tank Bottom

1. Series (Page Number): ULS-11 (A-39) ULS-10 (A-37) ULS-100 (A-37)

2. Input Power:ULS-10, ULS-100: 115 VAC 230 VAC 12 VDC 24 VDCULS-11: 9 to 36 VDC

3. Output (Check One Box Only):ULS-11: SPST N.O. N.C.ULS-10: DPDT 2-Wire, 4mA (Dry), 20mA (Wet) ULS-100: DPDT

5. Actuation Level Dimension:

4. Mounting Type:ULS-11: Type 1ULS-10, ULS-100: Integral Electronics: NEMA 4 Enclosure: NEMA 7 Enclosure: Remote Electronics: Sensor Cable Length ____________ inches

Please specify any non-standard material request here:

Standard sensor material is 316 Stainless Steel. See Table on Page A-34 for alternate materials available.

Range

Series Min. Max.

ULS-11 2-1/4˝ 99˝

ULS-10 2-1/4˝ 120˝

ULS-100 1˝ 120˝

Actuation Distance to Actuation Level Level – Inches*

L1

* Measure from bottom of mounting threads.

Please contact GEMS Sensors Inc. for any configuration or special requirements not covered on this form. 800-378-1600

Quote $ _________________ Date Quoted ____/____/____

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This form may also be completed online at gemssensors.com for RFQ.


LEVE

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Explosion-Proof J-Boxes

Aluminum Iron

Materials

Die Cast Aluminum Cast Iron

Stainless Steel Chain and Pin

EPDM Rubber Gasket (300°F/149°C Max. Service Temp.)

Finish Polished Electroless Nickel Plate

Weight (approx.) .62 lbs. .62 lbs.

NEMA Rating 4, 13 4

Part Number 192147 198848

Conduit/Cable Gland Connections

Standard 5-Amp Relay

Specifications Empty enclosure for lead wire splice connections.

120 VAC 50/60 HZ Contacts: 5A – 240 VAC Res

1/3 HP – 120 VAC 5A – 28 VDC Res.

Part Number 181410 180417

Non-Explosion Proof J-Boxes

Alloy Plastic

Type 3-pin 7-pin DPDT Relay 3-pin 7-pin

Part Number 113873 113877 75980 113850 118828

inchesmillimeters

PG-9 OUTLET PORT

1/2˝ NPT REF.

J-BOX-ASSEM.EPS

1.9549.53

2.3860.45

PYROMATION.EPS

3-1/16˝DIA. REF.

1-3/4˝HEX. REF.

3-1/8˝REF.

3-3/8˝REF.

1/2˝ NPT3/4˝ NPT

Junction boxes are CSA and FM approved for explosion proofing in Class I, Division 1, Groups B, C, D, E, F, G – Stock Items.

1/2˝ TRADE SIZE (2 PORTS)

3-3/4˝DIAMETER

1/2˝ TRADE SIZE (2 PORTS)

3-3/4˝DIAMETER

1/2˝ NPT 2 PORTS

4.27˝DIAMETER

juNCTION BOxES

GEMS offers optional CSA Listed and FM Approved, explosion-proof junction boxes for many level switch models. Compatible level switches are indicated throughout this catalog by the small icon– .

Junction Boxes

NOTE: Explosion-proof ratings are available only when J-boxes are part of factory assembled sensor unit. J-boxes below, when ordered separately, do not carry explosion-proof ratings.


LEVEL SWITCH

ES – SING

LE PO

INT

Fluid Properties Max. Container Wall Thickness Wet/Dry Sink Part Number

Water Based, Conductive

(unshielded sensor)5/8˝

Wet 230079

Dry 230081

Non-Water Based, Not Conductive

(shielded sensor)3/8˝

Wet 228830

Dry 229855

10-48VDC

BRN

BLK BLU

300mAmaxLOAD

LEDs

R0.1182˝(R3 mm)

0.1182˝(3 mm)

0.5910˝(15 mm)

0.2364˝(6 mm)

2.2458˝(57 mm)

1.1820˝(30 mm)

0.7880˝(20 mm)

1.7730˝(45 mm)

Pot

CAP-100 Series – Non-Contact, Capacitive Level Sensor For non-metallic containers Easy external mounting Compact – 30x45 mm (1.18˝ x 1.77˝) Potentiometer for sensitivity adjustment Power on and signal LED indicators

The CAP-100 series offers a unique level sensing solution for a wide variety of bottle types including plastic, glass and fiberglass. The non-contact sensor is ideally suited for medical applications such as waste, reagent or diluent liquids as well as dark, sticky or viscous fluids. The easy-to-calibrate sensor is available in both aqueous and non-aqueous versions and can be delivered with factory preset sensitivity for quick installation for OEM orders. The CAP-100 may also be used as a proximity sensor to detect the presence of solids such as paper or pulp.

SpecificationsPerformance Nominal Sensing Distance, Sn 0.39˝ (10mm) Sensing Range 0-0.39˝ (0-10mm) Repeat Accuracy - (% of Sn) <10% Hysteresis - (% of Sn) <20%Mechanical Enclosure Ratings IP67, NEMA 1,3,4,6,13 Operating Temperature Range -13°F to +158°F (-25°C to +70°C) LED Signal Indicator Yellow Power On LED Indicator Green Potentiometer Yes Sensor Type Unshielded L-Type, Non-Embeddable Shielded D-Type, Embeddable Sensor Material Glass Filled Nylon Cable 78.74˝ (2 meter), 3 Wire PVC Shock 30g, 11ms Vibration 55Hz, 1mm amplitude in all planesElectrical Supply Voltage 10-48 VDC Continuous Switching Current 300 mA Voltage Drop <2 VDC Current Consumption <10 mA Switching Frequency 100 Hz Transient Protection 2kV, 1ms, 1 kOhm Overload Protection Yes Short Circuit Yes Reverse Polarity Protection Yes Approvals CE

Typical ApplicationsFluid Monitoring: •Waste •Detergent/Wash •Reagents •Coolant •Diluent •PrintingInk

Dimensions

How To OrderSelect a Part Number based on Fluid Properties and Sink State.

Wiring Diagram


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1.14˝(29 mm)

2.047˝(52.0 mm)

0.374˝(9.5 mm)

0.768˝(19.5 mm)

1/2˝ NPT

0.906˝(23.0 mm)

1.043˝(26.5 mm)

10-48VDC

BRN

BLK BLU

300mAmaxLOAD

10-48VDC

BRN

BLK BLU

300mAmaxLOAD

Fluid Properties Min. Container Wall Thickness

Container Material Wet/Dry Sink Part Number

Water Based, Conductive

(unshielded sensor)5/8˝ Non-Metallic

N.O. Wet 230077

N.C. Dry 230078

Non-Water Based, Not Conductive

(shielded sensor)3/8˝ Non-Metallic

or Metallic

N.O. Wet 230082

N.C. Dry 230083

CAP-200 Series – Compact, 1/2˝NPT Mount For metallic and non-metallic containers Food grade plastic housing No sensor well required Potentiometer for sensitivity adjustment

The CAP-200 Series is easily threaded directly into 1/2˝ NPT fittings for an easy level sensing solution within a wide variety of metal and non-metal tanks. The highly accurate sensor is built from durable Delrin® material, and is available in both aqueous and non-aqueous versions. The easy to calibrate sensor can be delivered with factory preset sensitivity for quick installation by OEM. The CAP-200 may also be used as a proximity sensor to detect the presence of solids such as paper or pulp.

SpecificationsPerformance Nominal Sensing Distance, Sn 0.39˝ (10mm) Sensing Range 0-0.39˝ (0-10mm) Repeat Accuracy - (% of Sn) <10% Hysteresis - (% of Sn) <20%Mechanical Enclosure Ratings IP67, NEMA 1,3,4,6,13 Operating Temperature Range -13°F to +158°F (-25°C to +70°C) LED Signal Indicator Yellow Power On LED Indicator Green Potentiometer Yes Sensor Type Unshielded L-Type, Non-Embeddable Shielded D-Type, Embeddable Barrel Material Delrin®

Termination 78.74˝ (2 meter), 3 Wire PVC Shock 30g, 11ms Vibration 55Hz, 1mm amplitude in all planesElectrical Supply Voltage 10-48 VDC Continuous Switching Current 300 mA Voltage Drop <2 VDC Current Consumption <10 mA Switching Frequency 100 Hz Transient Protection 2kV, 1ms, 1 kOhm Overload Protection Yes Short Circuit Yes Reverse Polarity Protection Yes Approvals CE pending

Typical ApplicationsFluid Monitoring: •Waste •Detergent/Wash •Reagents •Coolant •Diluent •PrintingInk

Dimensions

How To OrderSelect a Part Number based on Fluid Properties and Sink State.

CAPACITANCE TYPE

Wiring DiagramNormally Open Normally Closed

Documents

Float Type Level Switches Contents Page Start